:root {
  color-scheme: light;
  --paper: #f2f6f3;
  --paper-strong: #ffffff;
  --paper-soft: #e2ebe4;
  --ink: #172622;
  --muted: #5d6f68;
  --line: #cedbd3;
  --line-strong: #9eb4aa;
  --teal: #0e7668;
  --teal-deep: #07483f;
  --teal-soft: #d5eee7;
  --cedar: #8d5f35;
  --amber: #d1971e;
  --blue: #315f76;
  --rose: #a44f61;
  --green-soft: #dcefe6;
  --amber-soft: #f3dfa8;
  --rose-soft: #f0dbe0;
  --shadow: 0 18px 48px rgba(16, 42, 34, 0.13);
  --radius: 8px;
  --font-size: 17px;
  --question-size: 20px;
}

[data-theme="dark"] {
  color-scheme: dark;
  --paper: #111917;
  --paper-strong: #1c2825;
  --paper-soft: #24332f;
  --ink: #edf3ef;
  --muted: #a8bbb3;
  --line: #334b43;
  --line-strong: #4f6a60;
  --teal: #65c8b8;
  --teal-deep: #a7e1d5;
  --teal-soft: #243f38;
  --cedar: #d19a78;
  --amber: #e4b45f;
  --blue: #93b8c9;
  --rose: #d3919a;
  --green-soft: #283a31;
  --amber-soft: #453926;
  --rose-soft: #432c31;
  --shadow: 0 18px 54px rgba(0, 0, 0, 0.28);
}

[data-font-size="s"] {
  --font-size: 15px;
  --question-size: 18px;
}

[data-font-size="l"] {
  --font-size: 19px;
  --question-size: 22px;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background:
    linear-gradient(90deg, rgba(7, 72, 63, 0.05) 1px, transparent 1px) 0 0 / 64px 64px,
    linear-gradient(180deg, rgba(49, 95, 118, 0.045) 1px, transparent 1px) 0 0 / 100% 34px,
    var(--paper);
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  font-family: "Optima", "Avenir Next", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: var(--font-size);
  line-height: 1.72;
  letter-spacing: 0;
}

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

a {
  color: inherit;
}

.noscript {
  margin: 24px;
  padding: 16px;
  border: 1px solid var(--line);
  background: var(--paper-strong);
}

.shell {
  min-height: 100vh;
}

.auth-shell {
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--green-soft), transparent 38%), transparent 34%),
    linear-gradient(315deg, color-mix(in srgb, var(--amber-soft), transparent 34%), transparent 38%);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid color-mix(in srgb, var(--line), transparent 14%);
  background: color-mix(in srgb, var(--paper), transparent 8%);
  backdrop-filter: blur(16px);
  transform: translateY(0);
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease;
  will-change: transform;
}

body.topbar-hidden .topbar {
  pointer-events: none;
  transform: translateY(calc(-100% - 12px));
}

body.topbar-at-top .topbar {
  box-shadow: none;
}

.topbar-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  width: min(1180px, calc(100% - 28px));
  margin: 0 auto;
  padding: 12px 0;
}

.brand {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--ink);
  text-align: left;
}

.auth-brand {
  cursor: default;
}

.brand-mark {
  display: grid;
  place-items: center;
  overflow: hidden;
  width: 46px;
  height: 46px;
  flex: 0 0 auto;
  padding: 2px;
  border: 1px solid color-mix(in srgb, var(--teal-deep), var(--line) 46%);
  border-radius: var(--radius);
  background: var(--paper-strong);
  box-shadow:
    0 10px 24px rgba(7, 72, 63, 0.12),
    inset 0 -2px 0 color-mix(in srgb, var(--amber), transparent 54%);
}

.brand-mark img {
  display: block;
  width: 100%;
  height: 100%;
  border-radius: calc(var(--radius) - 2px);
  object-fit: cover;
}

.brand-copy {
  min-width: 0;
}

.brand-title {
  display: block;
  font-family: "Iowan Old Style", "Songti SC", Georgia, serif;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.15;
  white-space: normal;
}

.brand-subtitle {
  display: block;
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.top-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.top-actions .sync-badge,
.top-actions .btn,
.top-actions .toggle {
  min-height: 36px;
  padding: 7px 10px;
  font-size: 13px;
  line-height: 1;
}

.page {
  width: min(1180px, calc(100% - 28px));
  margin: 0 auto;
  padding: 18px 0 56px;
}

.site-footer {
  display: flex;
  justify-content: center;
  width: min(1180px, calc(100% - 28px));
  margin: 0 auto;
  padding: 18px 0 28px;
  border-top: 1px solid color-mix(in srgb, var(--line), transparent 22%);
  color: var(--muted);
  font-size: 13px;
}

.site-footer a {
  color: inherit;
  text-decoration: none;
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: var(--teal-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.hero-band {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(340px, 0.88fr);
  gap: 22px;
  align-items: start;
  margin-bottom: 22px;
  padding: 18px 0 18px;
  border-bottom: 1px solid var(--line);
}

.platform-hero {
  position: relative;
  align-items: start;
  overflow: hidden;
  min-height: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--paper-strong), transparent 2%), color-mix(in srgb, var(--green-soft), transparent 22%)),
    repeating-linear-gradient(90deg, color-mix(in srgb, var(--line), transparent 72%) 0 1px, transparent 1px 96px);
  box-shadow: var(--shadow);
  animation: heroEnter 580ms ease both;
}

.platform-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, transparent 0%, color-mix(in srgb, var(--teal), transparent 88%) 48%, transparent 74%),
    repeating-linear-gradient(0deg, transparent 0 35px, color-mix(in srgb, var(--amber), transparent 88%) 36px 37px);
  opacity: 0.58;
  transform: translateX(-18%);
  animation: heroScan 7600ms ease-in-out infinite;
}

.platform-hero::after {
  content: "";
  position: absolute;
  right: clamp(6px, 2vw, 24px);
  bottom: -28px;
  z-index: 0;
  width: clamp(126px, 18vw, 216px);
  aspect-ratio: 1;
  pointer-events: none;
  background: url("./brand/hutb-koala-logo-512-20260608.png") center / cover no-repeat;
  opacity: 0.13;
}

.platform-hero > div:first-child {
  position: relative;
  z-index: 1;
  display: grid;
  align-content: start;
  padding: 4px 0 0;
}

.platform-hero h1 {
  max-width: 720px;
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1.03;
}

.home-command-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  max-width: 820px;
  margin-top: 18px;
}

.home-command-strip span {
  display: grid;
  gap: 4px;
  min-height: 64px;
  padding: 10px 12px;
  border: 1px solid color-mix(in srgb, var(--line), transparent 8%);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--paper-strong), transparent 1%), color-mix(in srgb, var(--paper), transparent 16%)),
    var(--paper-strong);
  box-shadow: 0 12px 30px rgba(26, 48, 42, 0.08);
  animation: heroEnter 620ms ease both;
}

.home-command-strip span:nth-child(2) {
  animation-delay: 80ms;
}

.home-command-strip span:nth-child(3) {
  animation-delay: 150ms;
}

.home-command-strip strong {
  color: var(--teal-deep);
  font-size: 15px;
  line-height: 1.2;
  overflow-wrap: anywhere;
}

.home-command-strip em {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.25;
  font-style: normal;
  font-weight: 800;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--cedar);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Baskerville", "Iowan Old Style", "Songti SC", Georgia, serif;
  letter-spacing: 0;
}

h1 {
  max-width: 820px;
  font-size: clamp(34px, 5vw, 64px);
  line-height: 0.98;
}

h2 {
  font-size: 26px;
  line-height: 1.15;
}

h3 {
  font-size: 20px;
  line-height: 1.2;
}

.hero-copy {
  margin: 14px 0 0;
  max-width: 760px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.55;
}

.hero-tools {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  align-content: start;
  align-items: start;
  justify-items: stretch;
}

.home-dashboard-stack {
  align-self: stretch;
}

.home-library-panel {
  display: grid;
  gap: 12px;
  padding: 16px;
  line-height: 1.26;
  border: 1px solid color-mix(in srgb, var(--line), transparent 4%);
  border-radius: var(--radius);
  background:
    linear-gradient(145deg, color-mix(in srgb, var(--paper-strong), transparent 1%), color-mix(in srgb, var(--green-soft), transparent 36%)),
    color-mix(in srgb, var(--paper-strong), transparent 3%);
  box-shadow: 0 22px 54px rgba(21, 43, 38, 0.14);
  animation: heroEnter 640ms ease both;
}

.home-brand-lockup,
.login-brand-banner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 11px;
  align-items: center;
  min-width: 0;
  padding: 10px;
  border: 1px solid color-mix(in srgb, var(--teal), var(--line) 48%);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--paper-strong), transparent 4%), color-mix(in srgb, var(--teal-soft), transparent 42%)),
    var(--paper-strong);
}

.home-brand-lockup img,
.login-brand-banner img {
  display: block;
  width: 54px;
  height: 54px;
  border-radius: calc(var(--radius) - 2px);
  object-fit: cover;
  box-shadow: 0 12px 24px rgba(7, 72, 63, 0.14);
}

.home-brand-lockup span,
.login-brand-banner span {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.home-brand-lockup strong,
.login-brand-banner strong {
  color: var(--teal-deep);
  font-size: 16px;
  line-height: 1.15;
}

.home-brand-lockup em,
.login-brand-banner em {
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  font-style: normal;
  font-weight: 800;
  line-height: 1.2;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.home-library-head {
  display: grid;
  gap: 6px;
}

.home-library-head h2 {
  font-size: clamp(22px, 2.3vw, 28px);
}

.home-library-head p {
  margin: 0;
  color: var(--muted);
  font-size: 12.5px;
  line-height: 1.45;
}

.home-library-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
}

.home-library-metrics span {
  display: grid;
  gap: 4px;
  min-width: 0;
  padding: 8px 10px;
  line-height: 1.2;
  border: 1px solid color-mix(in srgb, var(--line), transparent 14%);
  border-radius: calc(var(--radius) - 2px);
  background: linear-gradient(180deg, color-mix(in srgb, var(--paper-strong), transparent 18%), transparent);
}

.home-library-metrics em {
  color: var(--muted);
  font-size: 11px;
  font-style: normal;
  font-weight: 800;
}

.home-library-metrics strong {
  min-width: 0;
  color: var(--teal-deep);
  font-size: 18px;
  line-height: 1.15;
  overflow-wrap: anywhere;
}

.home-library-track {
  display: grid;
  gap: 7px;
  padding-top: 10px;
  border-top: 1px solid color-mix(in srgb, var(--line), transparent 12%);
}

.library-year-chip {
  display: grid;
  gap: 2px;
  padding: 8px 10px;
  line-height: 1.22;
  border: 1px solid color-mix(in srgb, var(--line), transparent 12%);
  border-left: 4px solid color-mix(in srgb, var(--line), transparent 4%);
  border-radius: calc(var(--radius) - 2px);
  background: color-mix(in srgb, var(--paper), transparent 18%);
}

.library-year-chip.active {
  border-left-color: var(--teal);
  background: color-mix(in srgb, var(--teal-soft), transparent 28%);
}

.library-year-chip strong {
  color: var(--ink);
  font-size: 15px;
}

.library-year-chip span {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.25;
}

@keyframes heroEnter {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes heroScan {
  0%,
  100% {
    transform: translateX(-18%);
  }
  50% {
    transform: translateX(12%);
  }
}

.resume-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-strong), transparent 6%);
  box-shadow: var(--shadow);
}

.resume-panel-inner {
  display: grid;
  gap: 12px;
  padding: 16px;
}

.resume-kicker {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.resume-title {
  font-size: 18px;
  font-weight: 800;
}

.resume-meta {
  color: var(--muted);
  font-size: 14px;
}

.study-panel,
.deadline-panel {
  display: grid;
  gap: 10px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-strong), transparent 6%);
  box-shadow: 0 12px 34px rgba(32, 40, 38, 0.08);
}

.study-time-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.study-time-cell {
  display: grid;
  gap: 2px;
  min-width: 0;
  padding: 8px;
  border: 1px solid color-mix(in srgb, var(--line), transparent 18%);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper), transparent 18%);
}

.study-time-cell span,
.deadline-row span,
.countdown-chip span,
.study-strip span {
  color: var(--muted);
  font-size: 13px;
}

.study-time-cell strong,
.study-strip strong {
  color: var(--teal-deep);
  font-size: 18px;
  line-height: 1.2;
}

.deadline-list {
  display: grid;
  gap: 7px;
}

.deadline-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 8px 10px;
  border: 1px solid color-mix(in srgb, var(--line), transparent 16%);
  border-left: 4px solid var(--teal);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper), transparent 16%);
}

.deadline-row.course-audit {
  border-left-color: var(--blue);
}

.deadline-row.course-ma {
  border-left-color: var(--amber);
}

.deadline-row > div {
  display: grid;
  min-width: 0;
}

.deadline-row strong {
  line-height: 1.25;
}

.countdown-value {
  color: var(--teal-deep);
  font-size: 15px;
  font-weight: 900;
  white-space: nowrap;
}

.countdown-value.completed,
.countdown-chip.completed strong {
  color: var(--muted);
}

.countdown-chip {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  width: 100%;
  min-width: 0;
  padding: 8px 10px;
  border: 1px solid color-mix(in srgb, var(--teal), var(--line) 35%);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--green-soft), transparent 25%);
}

.countdown-chip strong {
  color: var(--teal-deep);
  font-size: 16px;
  line-height: 1.2;
  text-align: right;
  white-space: nowrap;
}

.countdown-chip.large {
  max-width: 520px;
}

.countdown-chip.side {
  grid-template-columns: 1fr;
}

.countdown-chip.side strong {
  text-align: left;
  white-space: normal;
}

.study-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.study-strip span {
  display: inline-flex;
  gap: 6px;
  align-items: baseline;
  padding: 7px 10px;
  border: 1px solid color-mix(in srgb, var(--line), transparent 16%);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper), transparent 20%);
}

.course-head-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 14px;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: end;
  justify-content: space-between;
  margin: 26px 0 14px;
}

.section-note {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.set-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.set-group-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.set-card,
.course-card,
.question-card,
.sync-panel,
.formula-row,
.mini-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-strong), transparent 3%);
}

.set-card {
  display: grid;
  min-height: 246px;
  gap: 14px;
  padding: 18px;
  box-shadow: 0 12px 34px rgba(54, 42, 28, 0.08);
}

.set-group-card {
  display: grid;
  min-height: 226px;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-strong), transparent 3%);
  box-shadow: 0 12px 34px rgba(32, 40, 38, 0.08);
}

.course-card {
  position: relative;
  display: grid;
  min-height: 292px;
  gap: 16px;
  padding: 20px;
  overflow: hidden;
  box-shadow: 0 14px 40px rgba(32, 40, 38, 0.1);
}

.course-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 5px;
  background: linear-gradient(90deg, var(--teal), var(--amber));
}

.course-card h3 {
  font-size: 30px;
}

.course-card h3 span {
  display: inline-block;
  color: var(--muted);
  font-family: "Optima", "Avenir Next", "PingFang SC", sans-serif;
  font-size: 0.62em;
  font-weight: 800;
}

.course-card .btn {
  align-self: end;
  justify-self: start;
}

.set-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  align-self: end;
}

.download-btn {
  min-width: 0;
}

.pdf-badge {
  display: inline-grid;
  place-items: center;
  min-width: 36px;
  height: 24px;
  padding: 0 6px;
  border-radius: 4px;
  background: color-mix(in srgb, var(--cedar), transparent 84%);
  color: var(--cedar);
  font-size: 12px;
  font-weight: 900;
  line-height: 1;
}

.course-audit::before,
.course-head.course-audit {
  background: linear-gradient(90deg, var(--blue), var(--teal));
}

.course-ma::before,
.course-head.course-ma {
  background: linear-gradient(90deg, var(--amber), var(--teal));
}

.course-head {
  align-items: center;
  margin-top: 4px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--green-soft), transparent 18%), transparent 56%),
    color-mix(in srgb, var(--paper-strong), transparent 5%);
  box-shadow: 0 14px 40px rgba(32, 40, 38, 0.09);
}

.course-head.course-audit {
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--blue), transparent 84%), transparent 58%),
    color-mix(in srgb, var(--paper-strong), transparent 5%);
}

.course-head.course-ma {
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--amber), transparent 82%), transparent 58%),
    color-mix(in srgb, var(--paper-strong), transparent 5%);
}

.course-head h1 {
  max-width: 760px;
  font-size: clamp(38px, 5vw, 62px);
}

.set-card-top {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  justify-content: space-between;
}

.set-title {
  display: grid;
  gap: 5px;
}

.set-subtitle,
.question-meta,
.filter-meta,
.answer-note {
  color: var(--muted);
  font-size: 14px;
}

.count-stamp {
  min-width: 54px;
  padding: 4px 8px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--teal-deep);
  font-size: 13px;
  font-weight: 800;
  text-align: center;
}

.set-week-strip,
.review-group-nav {
  display: flex;
  gap: 6px;
  max-width: 100%;
  overflow-x: auto;
  scrollbar-width: none;
}

.set-week-strip::-webkit-scrollbar,
.review-group-nav::-webkit-scrollbar {
  display: none;
}

.set-week-strip span,
.review-group-nav button {
  flex: 0 0 auto;
  border: 1px solid color-mix(in srgb, var(--line), transparent 16%);
  border-radius: 999px;
  background: color-mix(in srgb, var(--paper), transparent 18%);
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  line-height: 1;
}

.set-week-strip span {
  padding: 7px 9px;
}

.review-group-nav {
  margin-top: 12px;
}

.review-group-nav button {
  min-height: 34px;
  padding: 8px 10px;
}

.review-group-nav button.active {
  border-color: color-mix(in srgb, var(--teal), var(--line) 18%);
  background: color-mix(in srgb, var(--teal), transparent 86%);
  color: var(--teal-deep);
}

.progress-track {
  height: 9px;
  overflow: hidden;
  border-radius: 999px;
  background: var(--paper-soft);
}

.progress-fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--teal), var(--amber));
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.stat-chip {
  min-width: 0;
  padding: 8px;
  border: 1px solid color-mix(in srgb, var(--line), transparent 16%);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper), transparent 18%);
}

.stat-value {
  display: block;
  font-size: 18px;
  font-weight: 800;
  line-height: 1.1;
}

.stat-label {
  display: block;
  overflow: hidden;
  color: var(--muted);
  font-size: 12px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.classification-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.mini-card {
  display: grid;
  gap: 9px;
  padding: 14px;
}

.mini-card strong {
  font-size: 18px;
}

.search-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
}

.search-input {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--paper-strong);
  color: var(--ink);
  padding: 12px 14px;
  outline: none;
}

.search-input:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--teal), transparent 78%);
}

.search-results,
.question-list {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.result-row,
.filter-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-strong), transparent 12%);
}

.search-snippet {
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.search-snippet mark {
  border-radius: 4px;
  background: color-mix(in srgb, var(--amber), transparent 66%);
  color: var(--ink);
}

.advanced-search {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  margin-top: 10px;
}

.advanced-search label {
  display: grid;
  gap: 4px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.advanced-search select {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-strong);
  color: var(--ink);
  padding: 8px 10px;
}

.home-panel-surface {
  margin-top: 26px;
  padding: 20px;
  border: 1px solid color-mix(in srgb, var(--line), transparent 8%);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--paper-strong), transparent 3%), color-mix(in srgb, var(--green-soft), transparent 48%)),
    var(--paper-strong);
  box-shadow: 0 18px 48px rgba(32, 40, 38, 0.08);
}

.home-panel-body {
  margin-top: 18px;
  animation: loginReveal 360ms ease both;
}

.year-accordion {
  display: grid;
  gap: 12px;
}

.year-panel {
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--line), transparent 6%);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-strong), transparent 5%);
}

.year-panel summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto 28px;
  gap: 16px;
  align-items: center;
  min-height: 66px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
}

.year-panel summary::-webkit-details-marker {
  display: none;
}

.year-panel summary::before {
  content: "+";
  display: grid;
  grid-column: 3;
  grid-row: 1;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 1px solid color-mix(in srgb, var(--line), transparent 8%);
  border-radius: 999px;
  color: var(--teal-deep);
  font-weight: 900;
}

.year-panel[open] summary::before {
  content: "-";
}

.year-panel summary > span:first-child {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.year-panel summary strong {
  color: var(--ink);
  font-size: 18px;
}

.year-panel summary em {
  color: var(--muted);
  font-size: 13px;
  font-style: normal;
}

.semester-status {
  justify-self: end;
  padding: 5px 10px;
  border: 1px solid color-mix(in srgb, var(--line), transparent 10%);
  border-radius: 999px;
  color: var(--teal-deep);
  font-size: 12px;
  font-weight: 900;
  white-space: nowrap;
}

.year-panel-body {
  padding: 0 16px 16px;
  border-top: 1px solid color-mix(in srgb, var(--line), transparent 16%);
}

.semester-pager {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  padding-top: 16px;
}

.semester-panel {
  display: grid;
  min-width: 0;
  border: 1px solid color-mix(in srgb, var(--line), transparent 8%);
  border-radius: calc(var(--radius) - 2px);
  background: color-mix(in srgb, var(--paper), transparent 18%);
}

.semester-panel.has-courses {
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--teal-soft), transparent 42%), transparent),
    color-mix(in srgb, var(--paper-strong), transparent 6%);
}

.semester-panel-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: start;
  min-width: 0;
  padding: 14px;
}

.semester-panel-head > div {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.semester-page-label {
  width: fit-content;
  padding: 4px 9px;
  border: 1px solid color-mix(in srgb, var(--teal), transparent 42%);
  border-radius: 999px;
  color: var(--teal-deep);
  font-size: 12px;
  font-weight: 900;
}

.semester-panel-head strong {
  color: var(--ink);
  font-size: 18px;
}

.semester-panel-head em {
  color: var(--muted);
  font-size: 13px;
  font-style: normal;
}

.semester-panel-body {
  padding: 0 14px 14px;
}

.semester-course-grid {
  grid-template-columns: 1fr;
  padding-top: 2px;
}

.semester-placeholder {
  display: flex;
  gap: 16px;
  align-items: center;
  justify-content: space-between;
  min-height: 86px;
  padding: 16px;
  border: 1px dashed color-mix(in srgb, var(--line), transparent 8%);
  border-radius: calc(var(--radius) - 2px);
  background: color-mix(in srgb, var(--paper), transparent 18%);
}

.semester-placeholder strong {
  color: var(--ink);
}

.semester-placeholder p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.semester-placeholder span {
  flex: 0 0 auto;
  padding: 6px 10px;
  border: 1px solid color-mix(in srgb, var(--line), transparent 8%);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

.course-resource-note {
  display: grid;
  gap: 4px;
  padding: 12px;
  border: 1px solid color-mix(in srgb, var(--line), transparent 12%);
  border-radius: calc(var(--radius) - 2px);
  background: color-mix(in srgb, var(--green-soft), transparent 38%);
}

.course-resource-note span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.course-resource-note strong {
  color: var(--teal-deep);
  font-size: 14px;
}

.course-tool-surface {
  margin-top: 24px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-strong), transparent 6%);
  box-shadow: 0 14px 38px rgba(32, 40, 38, 0.08);
}

.course-tool-tabs {
  display: inline-grid;
  grid-template-columns: repeat(2, minmax(148px, 1fr));
  gap: 5px;
  padding: 5px;
  border: 1px solid color-mix(in srgb, var(--line), transparent 12%);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper), transparent 14%);
}

.course-tool-tabs button {
  min-height: 38px;
  border: 0;
  border-radius: calc(var(--radius) - 3px);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-weight: 900;
  transition:
    background-color 180ms ease,
    box-shadow 180ms ease,
    color 180ms ease,
    transform 180ms ease;
}

.course-tool-tabs button:hover {
  color: var(--teal-deep);
  transform: translateY(-1px);
}

.course-tool-tabs button.active {
  background: var(--paper-strong);
  color: var(--teal-deep);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.78) inset,
    0 10px 24px rgba(32, 40, 38, 0.1);
}

.course-tool-body {
  animation: loginReveal 360ms ease both;
}

.course-tool-panel {
  min-width: 0;
}

.mock-exam-card,
.changelog-page {
  margin-top: 24px;
}

.sprint-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.sprint-card,
.mock-exam-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--paper-strong), transparent 0%), color-mix(in srgb, var(--green-soft), transparent 44%)),
    var(--paper-strong);
  box-shadow: 0 16px 42px rgba(32, 40, 38, 0.11);
}

.sprint-card {
  display: grid;
  gap: 14px;
  padding: 18px;
}

.sprint-card::before,
.mock-exam-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: linear-gradient(90deg, var(--teal), var(--amber), var(--blue));
}

.sprint-task-list,
.smart-review-list,
.sprint-pack-list,
.mock-question-list {
  display: grid;
  gap: 10px;
}

.sprint-task {
  display: grid;
  gap: 3px;
  padding: 10px 12px;
  border: 1px solid color-mix(in srgb, var(--line), transparent 18%);
  border-left: 4px solid var(--teal);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper), transparent 18%);
}

.sprint-task.weak-review {
  border-left-color: var(--rose);
}

.sprint-task.uncertain-review,
.sprint-task.template-drill {
  border-left-color: var(--amber);
}

.sprint-task span,
.smart-review-row p,
.mock-exam-head p,
.notebook-head span,
.help-issue-grid p,
.shortcut-help p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.smart-review-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 13px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-strong), transparent 10%);
}

.notebook-panel {
  display: grid;
  gap: 10px;
  margin-top: 16px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper), transparent 14%);
}

.notebook-head {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
}

.notebook-head > div {
  display: grid;
  gap: 2px;
}

.notebook-head span {
  color: var(--muted);
  font-size: 13px;
}

.notebook-body {
  display: grid;
  gap: 10px;
}

.notebook-body-actions {
  display: flex;
  justify-content: flex-end;
}

.notebook-panel textarea {
  width: 100%;
  min-height: 92px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-strong);
  color: var(--ink);
  padding: 10px 12px;
  outline: none;
}

.notebook-panel textarea:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--teal), transparent 78%);
}

.mock-exam-card {
  display: grid;
  gap: 16px;
  padding: 18px;
}

.mock-exam-head {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}

.mock-question {
  display: grid;
  gap: 10px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-strong), transparent 8%);
}

.mock-question h3 {
  font-size: 18px;
}

.mock-options {
  display: grid;
  gap: 8px;
}

.mock-option {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  padding: 10px;
  text-align: left;
}

.mock-option.selected {
  border-color: var(--teal);
  background: color-mix(in srgb, var(--green-soft), transparent 34%);
}

.mock-option.correct {
  border-color: var(--teal);
  box-shadow: inset 4px 0 0 var(--teal);
}

.mock-option.wrong {
  border-color: var(--rose);
  box-shadow: inset 4px 0 0 var(--rose);
}

.focus-mode .deadline-panel,
.focus-mode .countdown-chip,
.focus-mode .deadline-row,
[data-focus-mode="true"] .deadline-panel,
[data-focus-mode="true"] .countdown-chip,
[data-focus-mode="true"] .deadline-row {
  display: none;
}

.focus-mode .hero-copy::after {
  content: " 专注模式已开启：先完成下一组任务，再看倒计时。";
  color: var(--teal-deep);
  font-weight: 800;
}

.help-issue-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.help-issue-grid article,
.shortcut-help {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper), transparent 15%);
}

.shortcut-help {
  margin-top: 12px;
}

.sync-panel {
  display: grid;
  gap: 10px;
  padding: 14px;
}

.sync-panel p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.sync-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) auto;
  gap: 8px;
}

.sync-form input {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  padding: 9px 10px;
}

.login-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(320px, 0.88fr);
  gap: 28px;
  align-items: start;
  padding: clamp(36px, 7vh, 78px) 0 76px;
}

.login-hero-panel {
  display: grid;
  gap: 18px;
  align-content: start;
  max-width: 760px;
  animation: loginReveal 560ms ease both;
}

.login-brand-banner {
  width: min(378px, 100%);
  box-shadow: 0 16px 34px rgba(7, 72, 63, 0.1);
}

.login-hero-panel h1 {
  max-width: 760px;
  font-size: clamp(42px, 5.8vw, 72px);
  line-height: 0.96;
}

.login-course-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  max-width: 640px;
  margin-top: 4px;
}

.login-course-strip span {
  display: grid;
  gap: 2px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-strong), transparent 18%);
  animation: loginReveal 520ms ease both;
  transition:
    border-color 160ms ease,
    transform 160ms ease,
    background 160ms ease;
}

.login-course-strip span:nth-child(2) {
  animation-delay: 80ms;
}

.login-course-strip span:hover {
  border-color: color-mix(in srgb, var(--teal), var(--line) 38%);
  background: color-mix(in srgb, var(--paper-strong), transparent 8%);
  transform: translateY(-1px);
}

.login-course-strip strong {
  color: var(--teal-deep);
  font-size: 20px;
  line-height: 1.1;
}

.login-course-strip em {
  color: var(--muted);
  font-size: 13px;
  font-style: normal;
  font-weight: 800;
}

.login-audit-block {
  display: grid;
  gap: 12px;
  max-width: 680px;
  margin-top: 6px;
}

.login-audit-block h2 {
  font-size: 24px;
}

.login-audit-block p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.login-audit-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.login-audit-item {
  position: relative;
  display: grid;
  gap: 5px;
  min-height: 112px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-strong), transparent 12%);
  animation: loginReveal 520ms ease both;
  transition:
    border-color 160ms ease,
    transform 160ms ease,
    background 160ms ease;
}

.login-audit-item:nth-child(2) {
  animation-delay: 90ms;
}

.login-audit-item:nth-child(3) {
  animation-delay: 160ms;
}

.login-audit-item:hover {
  border-color: color-mix(in srgb, var(--teal), var(--line) 34%);
  background: color-mix(in srgb, var(--paper-strong), transparent 4%);
  transform: translateY(-1px);
}

.login-audit-item::before {
  content: "";
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--teal);
}

.login-audit-item em {
  color: var(--muted);
  font-size: 12px;
  font-style: normal;
  font-weight: 900;
}

.login-audit-item strong {
  color: var(--teal-deep);
  font-size: 21px;
  line-height: 1.1;
  font-weight: 800;
}

.login-audit-item small {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.35;
}

.login-audit-item.missing strong {
  color: var(--rose);
}

.login-audit-item.missing::before {
  background: var(--rose);
}

.login-card {
  position: relative;
  display: grid;
  gap: 16px;
  overflow: hidden;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--paper-strong), transparent 1%), color-mix(in srgb, var(--green-soft), transparent 52%)),
    color-mix(in srgb, var(--paper-strong), transparent 4%);
  box-shadow:
    0 26px 58px rgba(29, 42, 38, 0.14),
    0 2px 0 color-mix(in srgb, var(--paper-strong), transparent 20%) inset;
  animation: loginReveal 620ms ease 120ms both;
}

.login-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 5px;
  background: linear-gradient(90deg, var(--teal), var(--amber));
  background-size: 180% 100%;
  animation: loginSheen 5600ms ease-in-out infinite;
}

.login-card-kicker {
  color: var(--cedar);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.login-card-head {
  display: flex;
  gap: 10px;
  align-items: baseline;
  justify-content: space-between;
}

.login-card-head strong {
  color: var(--teal-deep);
  font-size: 26px;
}

.login-card-head span,
.login-note,
.login-card-copy {
  color: var(--muted);
  font-size: 14px;
}

.login-card-copy {
  margin: -6px 0 0;
}

.login-form {
  display: grid;
  gap: 14px;
}

.login-form label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 800;
}

.login-form input {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  padding: 12px 13px;
  outline: none;
}

.login-form input:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--teal), transparent 78%);
}

.login-memory-row {
  grid-template-columns: 18px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding: 11px 12px;
  border: 1px solid color-mix(in srgb, var(--line), transparent 12%);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper), transparent 4%);
  cursor: pointer;
}

.login-memory-row input {
  width: 16px;
  height: 16px;
  margin: 3px 0 0;
  accent-color: var(--teal-deep);
}

.login-memory-row span {
  display: grid;
  gap: 3px;
}

.login-memory-row strong {
  color: var(--ink);
  font-size: 14px;
}

.login-memory-row em {
  color: var(--muted);
  font-size: 12px;
  font-style: normal;
  font-weight: 700;
}

.login-password-hint {
  display: flex;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  border: 1px solid color-mix(in srgb, var(--line), transparent 12%);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--green-soft), transparent 42%);
  color: var(--muted);
  font-size: 13px;
}

.login-password-hint strong {
  color: var(--teal-deep);
  overflow-wrap: anywhere;
}

@keyframes loginReveal {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes loginSheen {
  0%,
  100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

.login-note {
  margin: 0;
}

.login-note.warning {
  padding: 12px;
  border: 1px solid color-mix(in srgb, var(--amber), transparent 24%);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--amber-soft), transparent 34%);
  color: var(--cedar);
  font-weight: 800;
}

@media (prefers-reduced-motion: reduce) {
  .platform-hero,
  .platform-hero::before,
  .home-command-strip span,
  .home-library-panel,
  .login-hero-panel,
  .login-course-strip span,
  .login-audit-item,
  .login-card,
  .login-card::before {
    animation: none;
  }
}

.account-grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr 1fr;
  gap: 14px;
}

.account-summary-grid {
  grid-template-columns: 1.25fr 1fr 1fr 0.95fr;
}

.account-card,
.account-settings {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-strong), transparent 4%);
}

.account-card {
  display: grid;
  gap: 8px;
  padding: 18px;
}

.identity-card {
  grid-template-columns: 54px minmax(0, 1fr);
  align-items: center;
}

.account-avatar {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  border-radius: var(--radius);
  background: var(--teal-deep);
  color: var(--paper-strong);
  font-size: 24px;
  font-weight: 900;
}

.image-avatar {
  object-fit: cover;
}

.account-card strong {
  color: var(--teal-deep);
  font-size: 22px;
}

.account-card p {
  margin: 0;
  color: var(--muted);
}

.account-action-card .btn {
  align-self: end;
  justify-self: start;
  margin-top: 4px;
}

.account-settings {
  display: grid;
  gap: 14px;
  margin-top: 16px;
  padding: 18px;
}

.account-forms-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.account-form-card {
  margin-top: 0;
}

.account-detail-panel {
  width: min(760px, 100%);
}

.account-form {
  display: grid;
  gap: 12px;
}

.account-form label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
}

.account-form input,
.account-form textarea,
.account-form select {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  padding: 11px 12px;
  outline: none;
}

.account-form textarea {
  resize: vertical;
}

.account-form input:focus,
.account-form textarea:focus,
.account-form select:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--teal), transparent 78%);
}

.account-form input:disabled {
  color: var(--muted);
  background: color-mix(in srgb, var(--paper), var(--line) 18%);
}

.account-code-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: end;
}

.account-code-row .btn {
  min-width: 96px;
  white-space: nowrap;
}

.form-hint {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
}

.account-feedback {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 14px;
  border: 1px solid var(--line-strong);
  border-left: 5px solid var(--teal);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-strong), var(--green-soft) 10%);
  box-shadow: 0 16px 40px color-mix(in srgb, var(--ink), transparent 90%);
}

.account-feedback div {
  display: grid;
  gap: 4px;
}

.account-feedback strong {
  color: var(--ink);
  font-size: 15px;
}

.account-feedback span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.account-feedback.success {
  border-left-color: var(--teal);
  background: color-mix(in srgb, var(--green-soft), var(--paper-strong) 58%);
}

.account-feedback.error {
  border-left-color: var(--cedar);
  background: color-mix(in srgb, var(--amber-soft), var(--paper-strong) 58%);
}

.account-feedback.info {
  border-left-color: var(--gold);
}

.inbox-top-button {
  position: relative;
  gap: 6px;
}

.inbox-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  min-height: 20px;
  padding: 0 6px;
  border-radius: 999px;
  color: #fff;
  background: var(--cedar);
  font-size: 11px;
  font-weight: 900;
  line-height: 1;
}

.inbox-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  justify-content: flex-end;
}

.inbox-page {
  display: grid;
  gap: 12px;
}

.inbox-enquiry-launch {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 16px;
  align-items: center;
  width: 100%;
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--green-soft), transparent 16%), transparent 46%),
    color-mix(in srgb, var(--paper-strong), var(--paper-soft) 28%);
  box-shadow: 0 18px 46px color-mix(in srgb, var(--ink), transparent 92%);
}

.inbox-enquiry-launch-copy {
  display: grid;
  gap: 6px;
  min-width: 0;
}

.inbox-enquiry-launch-copy strong {
  color: var(--ink);
  font-size: 20px;
}

.inbox-enquiry-launch-copy p {
  max-width: 64ch;
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.inbox-enquiry-launch-actions {
  display: flex;
  justify-content: flex-end;
}

.inbox-enquiry-card {
  display: grid;
  gap: 14px;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--paper-strong), var(--green-soft) 12%), var(--paper)),
    var(--paper);
  box-shadow: 0 18px 46px color-mix(in srgb, var(--ink), transparent 92%);
}

.inbox-enquiry-card label {
  display: grid;
  gap: 7px;
}

.inbox-enquiry-card label > span {
  color: var(--ink);
  font-weight: 800;
}

.inbox-enquiry-head {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
}

.inbox-enquiry-head div {
  display: grid;
  gap: 4px;
}

.inbox-enquiry-head strong {
  color: var(--ink);
  font-size: 18px;
}

.inbox-enquiry-grid {
  display: grid;
  grid-template-columns: minmax(180px, 0.6fr) minmax(0, 1fr);
  gap: 12px;
}

.inbox-enquiry-submit-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding-top: 2px;
}

.inbox-upload-row {
  display: grid;
  gap: 6px;
  padding: 14px;
  border: 1px dashed color-mix(in srgb, var(--line-strong), transparent 8%);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-soft), transparent 20%);
}

.inbox-card {
  display: grid;
  gap: 12px;
  width: 100%;
  max-width: 100%;
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: 0 18px 46px color-mix(in srgb, var(--ink), transparent 92%);
}

.inbox-card.unread {
  border-left: 5px solid var(--teal);
  background: color-mix(in srgb, var(--green-soft), var(--paper) 72%);
}

.inbox-card.latest {
  border-color: color-mix(in srgb, var(--teal), var(--line) 55%);
}

.inbox-card.collapsed {
  gap: 10px;
}

.inbox-card.error {
  border-left: 5px solid var(--cedar);
}

.inbox-card-head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  justify-content: space-between;
}

.inbox-card-head div {
  display: grid;
  gap: 4px;
}

.inbox-card-head strong {
  color: var(--ink);
  font-size: 18px;
}

.inbox-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.inbox-card-message.collapsed {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.inbox-time {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.inbox-card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.email-status-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 6px 10px;
  border: 1px solid color-mix(in srgb, var(--line), transparent 12%);
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

.email-status-pill.ok {
  color: var(--teal-deep);
  background: color-mix(in srgb, var(--green-soft), transparent 34%);
}

.email-status-pill.missing {
  color: var(--cedar);
  background: color-mix(in srgb, var(--amber-soft), transparent 28%);
}

.section-head.compact {
  margin: 0;
}

.settings-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.btn,
.icon-btn,
.toggle,
.segmented button,
.mark-btn {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--paper-strong);
  color: var(--ink);
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background 160ms ease,
    color 160ms ease;
}

.btn {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 9px 14px;
  font-weight: 800;
  text-decoration: none;
}

.btn:hover,
.icon-btn:hover,
.toggle:hover,
.segmented button:hover,
.mark-btn:hover {
  border-color: var(--teal);
  transform: translateY(-1px);
}

.btn.primary {
  border-color: var(--teal-deep);
  background: linear-gradient(180deg, color-mix(in srgb, var(--teal), var(--teal-deep) 36%), var(--teal-deep));
  color: var(--paper-strong);
  box-shadow: 0 10px 24px rgba(7, 72, 63, 0.18);
}

.btn.secondary {
  border-color: var(--cedar);
  color: var(--cedar);
}

.btn.ghost,
.icon-btn {
  background: color-mix(in srgb, var(--paper), transparent 10%);
}

.btn.small {
  min-height: 34px;
  padding: 6px 10px;
  font-size: 14px;
}

.icon-btn {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  padding: 0;
  font-weight: 900;
}

.toggle {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  min-height: 42px;
  padding: 8px 12px;
  font-weight: 800;
}

.toggle[aria-pressed="true"],
.segmented button.active,
.mark-btn.active {
  border-color: var(--teal-deep);
  background: color-mix(in srgb, var(--teal), transparent 82%);
  color: var(--teal-deep);
}

.sync-badge {
  display: inline-flex;
  gap: 7px;
  align-items: center;
  min-height: 34px;
  padding: 6px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--paper-strong), transparent 10%);
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.sync-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--amber);
}

.sync-badge.cloud .sync-dot {
  background: var(--teal);
}

.sync-badge.error .sync-dot {
  background: var(--rose);
}

.review-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 18px;
  align-items: start;
}

.question-card {
  min-width: 0;
  padding: 22px;
  box-shadow: var(--shadow);
}

.question-head {
  display: grid;
  gap: 12px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.question-title-line {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
}

.question-summary-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}

.question-summary-item {
  display: grid;
  gap: 4px;
  min-width: 0;
  padding: 10px 12px;
  border: 1px solid color-mix(in srgb, var(--line), transparent 10%);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-soft), transparent 18%);
}

.question-summary-item span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
}

.question-summary-item strong {
  overflow-wrap: anywhere;
  color: var(--ink);
  font-size: 14px;
  line-height: 1.25;
}

.question-summary-item.summary-answer {
  border-color: color-mix(in srgb, var(--teal), transparent 42%);
  background: color-mix(in srgb, var(--green-soft), transparent 20%);
}

.question-summary-item.summary-answer strong {
  color: var(--teal-deep);
  font-size: 16px;
  font-weight: 900;
}

.question-feedback-trigger {
  justify-self: start;
  border-color: color-mix(in srgb, var(--teal), var(--line) 28%);
  color: var(--teal-deep);
  background: color-mix(in srgb, var(--green-soft), transparent 18%);
}

.tag-row,
.topic-row,
.review-actions,
.mark-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.tag {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 9px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: color-mix(in srgb, var(--paper), transparent 12%);
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.tag.topic {
  color: var(--blue);
}

.tag.mastered {
  color: var(--teal-deep);
}

.tag.uncertain {
  color: var(--cedar);
}

.tag.weak {
  color: var(--rose);
}

.question-body {
  min-width: 0;
  display: grid;
  gap: 18px;
  padding-top: 20px;
}

.question-body > * {
  min-width: 0;
}

.ownership-diagram {
  display: grid;
  gap: 14px;
  padding: 16px;
  border: 1px solid color-mix(in srgb, var(--line-strong), transparent 18%);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--green-soft), transparent 15%), transparent 55%),
    color-mix(in srgb, var(--paper-strong), transparent 4%);
}

.ownership-diagram h3 {
  margin: 0;
  color: var(--teal-deep);
  font-size: 16px;
}

.ownership-tree {
  display: grid;
  gap: 16px;
  overflow-x: auto;
  padding: 6px 2px 2px;
}

.ownership-parent {
  justify-self: center;
  width: min(280px, 78%);
}

.ownership-branches {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, minmax(150px, 1fr));
  gap: 16px;
  min-width: 680px;
  padding-top: 28px;
}

.ownership-branches::before {
  content: "";
  position: absolute;
  top: 13px;
  left: calc(12.5% + 8px);
  right: calc(12.5% + 8px);
  border-top: 1px solid color-mix(in srgb, var(--teal), transparent 22%);
}

.ownership-branch {
  position: relative;
  display: grid;
  gap: 8px;
}

.ownership-branch::before {
  content: "";
  position: absolute;
  top: -15px;
  left: 50%;
  height: 15px;
  border-left: 1px solid color-mix(in srgb, var(--teal), transparent 22%);
}

.ownership-percent {
  justify-self: center;
  color: var(--ink);
  font-size: 24px;
  font-weight: 900;
}

.ownership-company {
  display: grid;
  gap: 4px;
  min-height: 118px;
  align-content: center;
  padding: 14px;
  border: 1px solid color-mix(in srgb, var(--teal), transparent 35%);
  border-radius: var(--radius);
  background:
    linear-gradient(90deg, color-mix(in srgb, #4277c8, transparent 10%) 0 18px, transparent 18px),
    color-mix(in srgb, var(--paper-strong), transparent 2%);
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--paper-strong), transparent 30%);
  text-align: center;
}

.ownership-company strong {
  font-size: 22px;
  line-height: 1.1;
}

.ownership-company span {
  font-size: 17px;
  line-height: 1.25;
}

.text-block {
  display: grid;
  gap: 10px;
}

.ma-question-text {
  gap: 12px;
  padding: 18px;
  border: 1px solid color-mix(in srgb, var(--line-strong), transparent 18%);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--paper-strong), transparent 6%), color-mix(in srgb, var(--paper), transparent 18%)),
    var(--paper);
}

.line-item {
  margin: 0;
  font-size: var(--question-size);
}

.ma-question-text .line-item {
  line-height: 1.75;
  white-space: pre-wrap;
}

.ma-question-text .dual-line {
  padding: 12px 0;
}

.dual-line {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 10px 0;
  border-bottom: 1px dashed color-mix(in srgb, var(--line), transparent 18%);
}

.dual-line .en,
.dual-line .zh,
.single-line {
  min-width: 0;
  margin: 0;
}

.dual-line .en {
  color: var(--ink);
}

.dual-line .zh {
  color: var(--muted);
}

.single-line.zh-only {
  color: var(--muted);
}

.required-block {
  display: grid;
  gap: 10px;
}

.required-block h3 {
  display: inline-flex;
  gap: 8px;
  align-items: baseline;
  color: var(--teal-deep);
  font-family: "Optima", "Avenir Next", "PingFang SC", sans-serif;
  font-size: 18px;
  font-weight: 900;
}

.required-block h3 span {
  color: var(--muted);
  font-weight: 800;
}

.required-list {
  display: grid;
  gap: 10px;
}

.required-card {
  display: grid;
  grid-template-columns: minmax(74px, max-content) minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 13px 16px;
  border-left: 4px solid var(--teal);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: color-mix(in srgb, var(--paper-soft), transparent 42%);
}

.required-key {
  color: var(--teal-deep);
  font-weight: 900;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.required-copy {
  display: grid;
  gap: 4px;
}

.required-copy p {
  margin: 0;
}

.options {
  display: grid;
  gap: 10px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.option {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr) auto;
  gap: 10px;
  align-items: start;
  width: 100%;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-strong), transparent 7%);
  color: var(--ink);
  text-align: left;
}

.option-key {
  display: grid;
  place-items: center;
  min-width: 34px;
  width: auto;
  height: 34px;
  padding: 0 8px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  color: var(--teal-deep);
  font-weight: 900;
}

.option.correct {
  border-color: var(--teal);
  background: color-mix(in srgb, var(--green-soft), transparent 28%);
}

.option.selected-correct {
  box-shadow: inset 4px 0 0 var(--teal);
}

.option.selected-wrong {
  border-color: var(--rose);
  background: color-mix(in srgb, var(--rose-soft), transparent 24%);
  box-shadow: inset 4px 0 0 var(--rose);
}

.option.correct .option-key {
  border-color: var(--teal);
  background: var(--teal);
  color: var(--paper-strong);
}

.option.selected-wrong .option-key {
  border-color: var(--rose);
  background: var(--rose);
  color: var(--paper-strong);
}

.option-result {
  align-self: center;
  min-width: 44px;
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 900;
  text-align: center;
}

.correct-label {
  background: color-mix(in srgb, var(--teal), transparent 82%);
  color: var(--teal-deep);
}

.wrong-label {
  background: color-mix(in srgb, var(--rose), transparent 82%);
  color: var(--rose);
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid color-mix(in srgb, var(--line), transparent 22%);
  border-radius: var(--radius);
}

table {
  width: 100%;
  min-width: 520px;
  border-collapse: collapse;
  background: color-mix(in srgb, var(--paper-strong), transparent 7%);
}

td,
th {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  background: color-mix(in srgb, var(--green-soft), transparent 8%);
  color: var(--ink);
  font-weight: 900;
}

.table-title-zh {
  color: var(--muted);
  font-size: 0.86em;
  font-weight: 800;
}

.table-cell-en,
.table-cell-zh {
  display: block;
}

.table-cell-zh {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.9em;
  line-height: 1.45;
}

.appendix-table .table-cell-zh {
  font-size: 0.86em;
}

.explanation {
  display: grid;
  gap: 22px;
  margin-top: 4px;
  padding: 22px 0 0;
  border-top: 1px solid color-mix(in srgb, var(--line), transparent 12%);
}

.answer-strip,
.warning-strip {
  display: grid;
  gap: 5px;
  padding: 13px 14px;
  border-radius: var(--radius);
}

.answer-strip {
  justify-items: center;
  border: 0;
  background: color-mix(in srgb, var(--green-soft), transparent 18%);
  color: var(--teal-deep);
}

.warning-strip {
  border: 1px solid color-mix(in srgb, var(--amber), transparent 20%);
  background: color-mix(in srgb, var(--amber-soft), transparent 25%);
}

.answer-main {
  font-size: 20px;
  font-weight: 900;
}

.explanation-abbreviation-block {
  display: grid;
  gap: 12px;
  padding: 16px;
  border: 1px solid color-mix(in srgb, var(--teal), var(--line) 38%);
  border-left: 5px solid var(--teal);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--green-soft), transparent 20%), transparent 70%),
    color-mix(in srgb, var(--paper-strong), transparent 2%);
}

.explanation-abbreviation-head {
  display: grid;
  gap: 4px;
}

.explanation-abbreviation-head h3,
.explanation-abbreviation-head p {
  margin: 0;
}

.explanation-abbreviation-head h3 {
  color: var(--teal-deep);
  font-size: 22px;
}

.explanation-abbreviation-head p {
  color: var(--muted);
  font-size: 14px;
}

.explanation-abbreviation-grid {
  display: grid;
  gap: 6px;
}

.explanation-abbreviation-header {
  display: grid;
  grid-template-columns: minmax(58px, 0.45fr) minmax(96px, 0.8fr) minmax(140px, 1.2fr) minmax(220px, 2fr);
  gap: 10px;
  padding: 0 10px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 900;
  line-height: 1.2;
}

.explanation-abbreviation-item {
  display: grid;
  grid-template-columns: minmax(58px, 0.45fr) minmax(96px, 0.8fr) minmax(140px, 1.2fr) minmax(220px, 2fr);
  gap: 10px;
  align-items: start;
  padding: 10px;
  border: 1px solid color-mix(in srgb, var(--line), transparent 14%);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-strong), transparent 4%);
}

.explanation-abbreviation-item strong {
  color: var(--teal-deep);
  font-family: "Times New Roman", Georgia, serif;
  font-size: 26px;
  font-weight: 900;
  line-height: 1;
}

.abbreviation-zh-full {
  color: var(--ink);
  font-weight: 900;
  line-height: 1.35;
}

.abbreviation-en-full {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.35;
}

.explanation-abbreviation-item p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

@media (max-width: 760px) {
  .explanation-abbreviation-header {
    display: none;
  }

  .explanation-abbreviation-item {
    grid-template-columns: minmax(52px, auto) minmax(0, 1fr);
  }

  .abbreviation-en-full,
  .explanation-abbreviation-item p {
    grid-column: 2;
  }
}

.solution-toggle {
  width: 100%;
  min-height: 58px;
  border: 0;
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--green-soft), transparent 6%);
  color: var(--teal-deep);
  font-weight: 900;
  text-align: center;
}

.solution-toggle:hover {
  background: color-mix(in srgb, var(--green-soft), transparent 0%);
  transform: translateY(-1px);
}

.explain-section {
  display: grid;
  gap: 18px;
}

.explain-title {
  display: flex;
  gap: 8px;
  align-items: center;
  color: var(--teal-deep);
  font-size: 17px;
  font-weight: 900;
}

.explain-title::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: var(--teal);
}

.handout-explanation {
  gap: 34px;
  padding-top: 30px;
  font-family: "Times New Roman", "Songti SC", "STSong", serif;
  color: color-mix(in srgb, var(--ink), black 8%);
}

.handout-explanation .explain-section {
  gap: 22px;
  padding: 0 0 30px;
  border-bottom: 1px solid color-mix(in srgb, var(--line-strong), transparent 18%);
}

.handout-explanation .explain-title {
  color: var(--ink);
  font-family: "Times New Roman", "Songti SC", "STSong", serif;
  font-size: 28px;
  font-weight: 900;
  line-height: 1.25;
}

.handout-explanation .explain-title::before {
  display: none;
}

.handout-explanation .rich-blocks {
  display: grid;
  gap: 18px;
}

.handout-paragraph,
.handout-explanation .rich-paragraph {
  display: grid;
  gap: 14px;
  font-size: 17px;
  line-height: 1.9;
}

.handout-paragraph p,
.handout-final p {
  margin: 0;
}

.handout-bilingual {
  display: grid;
  gap: 8px;
}

.handout-bilingual .handout-en {
  color: var(--ink);
}

.handout-bilingual .handout-zh {
  color: var(--muted);
}

.handout-step {
  display: grid;
  gap: 18px;
}

.handout-step .step-title {
  margin: 2px 0 0;
  border: 0;
  color: var(--ink);
  font-family: "Times New Roman", "Songti SC", "STSong", serif;
  font-size: 22px;
  line-height: 1.35;
}

.handout-step .step-body {
  display: grid;
  gap: 18px;
}

.handout-explanation .explain-list {
  gap: 12px;
  padding-left: 26px;
  font-size: 16.5px;
  line-height: 1.78;
}

.handout-explanation .explain-list li {
  padding: 2px 0 4px;
}

.handout-subhead {
  margin: 8px 0 2px;
  color: var(--ink);
  font-family: "Times New Roman", "Songti SC", "STSong", serif;
  font-size: 22px;
  font-weight: 900;
  line-height: 1.35;
}

.handout-spacer {
  min-height: 34px;
}

.handout-spacer.small {
  min-height: 20px;
}

.handout-spacer.large {
  min-height: 58px;
}

.handout-amount {
  display: grid;
  place-items: center;
  min-height: 54px;
  padding: 12px 18px;
  color: var(--ink);
  font-family: "Times New Roman", "Songti SC", "STSong", serif;
  font-size: 18px;
  font-weight: 800;
  text-align: center;
}

.handout-amount p {
  margin: 0;
}

.handout-explanation .rich-table-block {
  margin: 6px 0 12px;
}

.handout-explanation .rich-table-title {
  color: var(--ink);
  font-family: "Times New Roman", "Songti SC", "STSong", serif;
  font-size: 18px;
  font-weight: 900;
}

.handout-explanation .rich-table th,
.handout-explanation .rich-table td {
  padding: 9px 12px;
  font-size: 16px;
  line-height: 1.6;
}

.formula-line {
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper), transparent 10%);
  font-family: "Baskerville", "Iowan Old Style", "Times New Roman", serif;
  font-size: 1.02em;
  overflow-wrap: anywhere;
}

.handout-explanation .formula-line {
  padding: 12px 14px;
  line-height: 1.72;
}

.quick-reference-list {
  display: grid;
  gap: 8px;
}

.quick-reference-item {
  position: relative;
  display: grid;
  gap: 6px;
  padding-left: 86px;
  font-family: "Optima", "Avenir Next", "PingFang SC", sans-serif;
}

.quick-reference-item.formula {
  background: color-mix(in srgb, var(--green-soft), transparent 34%);
}

.quick-type {
  position: absolute;
  top: 10px;
  left: 10px;
  min-width: 58px;
  padding: 3px 6px;
  border: 1px solid color-mix(in srgb, var(--line-strong), transparent 8%);
  border-radius: 4px;
  background: color-mix(in srgb, var(--paper-strong), transparent 8%);
  color: var(--teal-deep);
  font-size: 11px;
  font-weight: 900;
  line-height: 1.2;
  text-align: center;
  text-transform: uppercase;
}

.quick-en,
.quick-zh {
  display: block;
  min-width: 0;
}

.quick-en {
  color: var(--ink);
  font-weight: 800;
}

.quick-zh {
  color: var(--muted);
  font-size: 0.94em;
}

.quick-reference-item .math-expression {
  justify-content: flex-start;
  font-size: 1.03em;
  text-align: left;
}

.math-line {
  display: grid;
  gap: 8px;
}

.math-expression {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  column-gap: 0.2em;
  row-gap: 0.24em;
  font-family: "Times New Roman", Georgia, "Songti SC", "STSong", serif;
  font-size: 1.04em;
  font-style: normal;
  font-variant-numeric: lining-nums tabular-nums;
  font-weight: 600;
  letter-spacing: 0;
  line-height: 1.35;
}

.math-expression var {
  color: var(--blue);
  font-style: italic;
  font-weight: 700;
}

.frac {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  place-items: center;
  min-width: 1.6em;
  margin: 0 0.12em;
  font-size: 0.86em;
  line-height: 1.05;
  vertical-align: middle;
}

.frac-line {
  width: 100%;
  border-top: 1px solid currentColor;
  text-align: center;
}

.formula-translation {
  color: var(--muted);
  font-family: "Optima", "PingFang SC", sans-serif;
  font-size: 0.92em;
  font-style: normal;
}

.rich-section {
  padding: 0;
  border: 0;
  background: transparent;
}

.rich-blocks {
  display: grid;
  gap: 22px;
}

.rich-paragraph p,
.explain-note p {
  margin: 0;
}

.rich-paragraph {
  display: grid;
  gap: 5px;
}

.explain-note {
  display: grid;
  gap: 10px;
  padding: 18px 20px;
  border-left: 4px solid var(--amber);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--amber-soft), transparent 55%);
}

.explain-note.note-rule {
  border-left-color: var(--amber);
}

.explain-note.note-warning {
  border: 1px solid color-mix(in srgb, var(--amber), transparent 20%);
  border-left-width: 1px;
  background: color-mix(in srgb, var(--amber-soft), transparent 35%);
}

.keyword-chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.keyword-chip {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 5px 10px;
  border: 1px solid color-mix(in srgb, var(--teal), transparent 45%);
  border-radius: 999px;
  background: color-mix(in srgb, var(--green-soft), transparent 24%);
  color: var(--teal-deep);
  font-size: 13px;
  font-weight: 800;
  line-height: 1.25;
}

.explain-list {
  display: grid;
  gap: 7px;
  margin: 0;
  padding-left: 22px;
}

.rich-table-block {
  display: grid;
  gap: 8px;
}

.rich-table-title {
  color: var(--teal-deep);
  font-size: 14px;
  font-weight: 900;
}

.rich-table th {
  background: color-mix(in srgb, var(--green-soft), transparent 6%);
  color: var(--ink);
  font-size: 0.92em;
}

.rich-table tr:nth-child(even) td {
  background: color-mix(in srgb, var(--paper-soft), transparent 48%);
}

.rich-table .highlight-row td {
  border-top: 2px solid var(--teal-deep);
  background: color-mix(in srgb, var(--green-soft), transparent 10%);
  font-weight: 900;
}

.subtopic-block,
.step-block {
  display: grid;
  gap: 12px;
}

.subtopic-title,
.step-title {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: 0;
  color: var(--teal-deep);
  font-family: "Optima", "Avenir Next", "PingFang SC", sans-serif;
  font-size: 20px;
  font-weight: 900;
  line-height: 1.25;
}

.subtopic-key {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius);
  background: var(--teal-deep);
  color: var(--paper-strong);
  font-size: 15px;
}

.subtopic-zh,
.step-title-zh {
  color: var(--muted);
  font-weight: 800;
}

.subtopic-body,
.step-body {
  display: grid;
  gap: 14px;
}

.step-title {
  padding-bottom: 10px;
  border-bottom: 1px solid color-mix(in srgb, var(--teal), transparent 72%);
  font-size: 22px;
}

.formula-group {
  display: grid;
  gap: 10px;
  padding: 14px;
  border-left: 4px solid var(--teal-deep);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--amber-soft), transparent 62%);
}

.formula-intro {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  align-items: center;
  color: var(--muted);
  font-weight: 900;
}

.formula-badge {
  padding: 3px 9px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--green-soft), transparent 2%);
  color: var(--teal-deep);
  font-size: 13px;
}

.formula-intro-zh {
  color: var(--muted);
}

.formula-abstract,
.formula-worked {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 68px;
  padding: 14px 16px;
  border: 1px dashed color-mix(in srgb, var(--line), transparent 10%);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-strong), transparent 26%);
  text-align: center;
}

.formula-abstract {
  font-family: "Optima", "PingFang SC", sans-serif;
  font-size: 0.96em;
  font-style: normal;
  line-height: 1.65;
}

.formula-abstract-zh {
  min-height: 56px;
  color: var(--muted);
  font-weight: 700;
}

.formula-worked {
  display: grid;
  place-items: center;
  gap: 8px;
  border: 0;
  background: color-mix(in srgb, var(--paper-soft), transparent 42%);
  font-size: 1.12em;
}

.formula-worked .math-expression {
  font-size: 1.16em;
}

.formula-worked .formula-translation {
  text-align: center;
}

.final-answer-block {
  display: grid;
  gap: 8px;
  padding: 18px 22px;
  border-left: 5px solid #19bd7d;
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--green-soft), transparent 10%);
  font-weight: 900;
}

.final-answer-block p {
  margin: 0;
}

.side-panel {
  min-width: 0;
  position: sticky;
  top: 86px;
  display: grid;
  gap: 12px;
}

.side-box {
  display: grid;
  gap: 10px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-strong), transparent 6%);
}

.side-notebook-panel {
  margin-top: 0;
}

.side-notebook-panel .notebook-head {
  align-items: start;
}

.side-notebook-panel .notebook-body {
  padding-top: 10px;
  border-top: 1px solid color-mix(in srgb, var(--line), transparent 18%);
}

.side-notebook-panel textarea {
  min-height: 150px;
  resize: vertical;
}

.floating-appendix {
  display: grid;
  gap: 10px;
}

.review-appendix {
  margin-top: 16px;
}

.mock-exam-appendix {
  position: fixed;
  top: 196px;
  right: max(14px, calc((100vw - 1180px) / 2));
  z-index: 24;
  width: min(360px, calc(100vw - 28px));
}

.appendix-toggle {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  align-items: center;
  min-height: 44px;
  padding: 10px 12px;
  border-color: color-mix(in srgb, var(--teal), var(--line) 28%);
  background: color-mix(in srgb, var(--green-soft), transparent 8%);
  color: var(--teal-deep);
  box-shadow: var(--shadow);
}

.appendix-toggle span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.review-appendix .appendix-toggle {
  box-shadow: none;
}

.appendix-panel {
  max-height: min(620px, calc(100vh - 250px));
  overflow: auto;
  padding: 14px;
  border: 1px solid color-mix(in srgb, var(--line-strong), transparent 12%);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-strong), transparent 1%);
  box-shadow: var(--shadow);
}

.review-appendix .appendix-panel {
  max-height: min(520px, 58vh);
  box-shadow: none;
}

.appendix-head {
  display: grid;
  gap: 4px;
  margin-bottom: 12px;
}

.appendix-head h3,
.appendix-head p {
  margin: 0;
}

.appendix-head p {
  color: var(--muted);
  font-size: 13px;
}

.appendix-section {
  display: grid;
  gap: 7px;
  padding: 12px 0;
  border-top: 1px solid var(--line);
}

.appendix-section h4 {
  margin: 0;
  color: var(--teal-deep);
  font-size: 15px;
}

.appendix-table {
  min-width: 0;
  background: transparent;
  font-size: 13px;
}

.appendix-table td,
.appendix-table th {
  padding: 7px 0;
  border-bottom: 1px solid color-mix(in srgb, var(--line), transparent 22%);
}

.appendix-table td:last-child,
.appendix-table th:last-child {
  width: 98px;
  padding-left: 12px;
  color: var(--ink);
  font-weight: 900;
  white-space: nowrap;
}

.segmented {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 6px;
}

.reference-switch {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  width: min(420px, 100%);
  margin: 0 0 14px;
}

.segmented button,
.mark-btn {
  min-height: 38px;
  padding: 7px 9px;
  font-weight: 800;
}

.mark-btn.mastered {
  border-color: color-mix(in srgb, var(--teal), var(--line) 30%);
}

.mark-btn.uncertain {
  border-color: color-mix(in srgb, var(--amber), var(--line) 30%);
}

.mark-btn.weak {
  border-color: color-mix(in srgb, var(--rose), var(--line) 30%);
}

.formula-grid {
  display: grid;
  gap: 12px;
}

.formula-row {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 14px;
  padding: 14px;
}

.formula-topic {
  display: grid;
  align-content: start;
  gap: 4px;
  color: var(--teal-deep);
  font-weight: 900;
}

.formula-topic span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.empty-state {
  padding: 24px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-strong), transparent 18%);
  color: var(--muted);
  text-align: center;
}

.toast {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 40;
  max-width: min(420px, calc(100vw - 36px));
  padding: 12px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--paper-strong);
  color: var(--ink);
  box-shadow: var(--shadow);
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 35;
  display: grid;
  align-items: start;
  justify-items: center;
  padding: 82px 16px 24px;
  overflow-y: auto;
  background: color-mix(in srgb, var(--ink), transparent 72%);
}

.modal-panel {
  width: min(760px, 100%);
  max-height: min(760px, calc(100vh - 112px));
  overflow: auto;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--paper-strong);
  box-shadow: var(--shadow);
}

.email-modal {
  width: min(560px, 100%);
}

.email-modal .account-form {
  padding: 18px;
}

.feedback-modal {
  width: min(660px, 100%);
}

.inbox-enquiry-modal {
  width: min(900px, 100%);
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  overflow: hidden;
}

.inbox-enquiry-panel-grid {
  display: grid;
  grid-template-columns: minmax(190px, 240px) minmax(0, 1fr);
  min-height: 0;
  overflow: auto;
}

.inbox-enquiry-side {
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 20px;
  border-right: 1px solid var(--line);
  background:
    linear-gradient(180deg, color-mix(in srgb, var(--green-soft), transparent 18%), transparent 64%),
    color-mix(in srgb, var(--paper-soft), transparent 14%);
}

.inbox-enquiry-side strong {
  color: var(--ink);
  font-size: 20px;
}

.inbox-enquiry-side p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.inbox-enquiry-side-card {
  display: grid;
  gap: 6px;
  padding: 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-strong), transparent 8%);
}

.inbox-enquiry-side-card span,
.inbox-enquiry-side-card small {
  color: var(--muted);
}

.inbox-enquiry-side-card strong {
  font-size: 14px;
  line-height: 1.55;
}

.inbox-enquiry-modal .inbox-enquiry-card {
  border: 0;
  border-radius: 0;
  background: var(--paper-strong);
  box-shadow: none;
}

.inbox-html-modal {
  width: min(1120px, 100%);
  max-height: none;
  overflow: visible;
}

.inbox-html-scroll {
  margin: 0 14px 14px;
  overflow: visible;
  background: transparent;
}

.inbox-html-inline {
  margin: 12px 0 4px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.inbox-html-frame {
  display: block;
  width: 100%;
  height: auto;
  min-height: 360px;
  border: 0;
  border-radius: 0;
  background: #fff;
}

.inbox-html-modal-frame {
  min-height: min(760px, calc(100vh - 220px));
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.question-feedback-form {
  padding: 18px;
}

.feedback-question-context {
  display: grid;
  gap: 5px;
  padding: 12px 14px;
  border: 1px solid color-mix(in srgb, var(--line), transparent 12%);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper-soft), transparent 18%);
}

.feedback-question-context span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
}

.feedback-question-context strong {
  overflow-wrap: anywhere;
  line-height: 1.35;
}

.feedback-type-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

.feedback-type-grid legend {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
}

.feedback-type-option {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  min-width: 0;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper), transparent 8%);
  cursor: pointer;
}

.feedback-type-option input {
  width: 16px;
  height: 16px;
  margin-top: 2px;
}

.feedback-type-option span {
  display: grid;
  gap: 3px;
  min-width: 0;
}

.feedback-type-option strong {
  color: var(--ink);
  font-size: 14px;
}

.feedback-type-option em {
  color: var(--muted);
  font-size: 12px;
  font-style: normal;
  line-height: 1.4;
}

.feedback-result {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  border: 1px solid var(--line-strong);
  border-left: 5px solid var(--teal);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--green-soft), var(--paper-strong) 60%);
}

.feedback-result strong {
  color: var(--ink);
}

.feedback-result span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.feedback-result.error {
  border-left-color: var(--cedar);
  background: color-mix(in srgb, var(--amber-soft), var(--paper-strong) 58%);
}

.feedback-result.info {
  border-left-color: var(--gold);
}

.modal-lock-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 6px 10px;
  border: 1px solid color-mix(in srgb, var(--gold), transparent 24%);
  border-radius: 999px;
  color: var(--ink);
  background: color-mix(in srgb, var(--amber-soft), transparent 18%);
  font-size: 12px;
  font-weight: 900;
}

.email-modal-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  flex-wrap: wrap;
}

.modal-head {
  position: sticky;
  top: 0;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
  padding: 18px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--paper-strong), transparent 4%);
}

.changelog-list {
  display: grid;
  gap: 0;
}

.changelog-entry {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 16px;
  padding: 18px;
  border-bottom: 1px solid var(--line);
}

.changelog-entry:last-child {
  border-bottom: 0;
}

.changelog-entry h3 {
  margin-bottom: 8px;
  font-size: 18px;
}

.changelog-entry ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.changelog-meta {
  display: grid;
  align-content: start;
  gap: 4px;
  color: var(--teal-deep);
}

.changelog-meta strong {
  font-family: "Iowan Old Style", Georgia, serif;
  font-size: 18px;
}

.changelog-meta span {
  color: var(--muted);
  font-size: 13px;
}

.help-contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(170px, 220px);
  gap: 14px;
  align-items: stretch;
  margin-top: 10px;
}

.help-contact {
  display: grid;
  gap: 8px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--paper), transparent 14%);
}

.help-contact > span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
}

.help-email-label {
  margin-top: 6px;
}

.help-contact-title {
  color: var(--ink);
  font-size: 18px;
  line-height: 1.35;
}

.help-email {
  width: fit-content;
  color: var(--teal-deep);
  font-size: 22px;
  font-weight: 900;
  text-decoration-thickness: 2px;
  overflow-wrap: anywhere;
}

.help-contact p {
  margin: 4px 0 0;
  color: var(--muted);
}

.help-wecom-card {
  display: grid;
  gap: 8px;
  justify-items: center;
  margin: 0;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 14px 35px color-mix(in srgb, var(--teal), transparent 86%);
}

.help-wecom-card img {
  display: block;
  width: min(100%, 190px);
  border-radius: 12px;
}

.help-wecom-card figcaption {
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  text-align: center;
}

.hidden {
  display: none !important;
}

@media (max-width: 900px) {
  .topbar-inner {
    grid-template-columns: 1fr;
  }

  .top-actions {
    justify-content: flex-start;
  }

  .hero-band,
  .login-layout,
  .review-layout {
    grid-template-columns: 1fr;
  }

  .side-panel {
    position: static;
    grid-row: auto;
  }

  .mock-exam-appendix {
    position: sticky;
    top: 82px;
    right: auto;
    width: 100%;
  }

  .ownership-branches {
    min-width: 620px;
  }

  .set-grid,
  .set-group-grid,
  .course-grid,
  .account-grid,
  .classification-grid,
  .sprint-grid {
    grid-template-columns: 1fr 1fr;
  }

  .advanced-search {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .account-forms-grid {
    grid-template-columns: 1fr;
  }

  .account-code-row {
    grid-template-columns: 1fr;
    align-items: stretch;
  }

  .dual-line {
    grid-template-columns: 1fr;
    gap: 5px;
  }

  .formula-row {
    grid-template-columns: 1fr;
  }

  .login-audit-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .changelog-entry {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .topbar-inner {
    gap: 6px;
    width: min(100% - 16px, 1180px);
    padding: 8px 0;
  }

  .brand {
    gap: 9px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
  }

  .home-brand-lockup,
  .login-brand-banner {
    gap: 9px;
    padding: 8px;
  }

  .home-brand-lockup img,
  .login-brand-banner img {
    width: 46px;
    height: 46px;
  }

  .brand-title {
    font-size: 16px;
  }

  .brand-subtitle {
    display: none;
  }

  .page {
    width: min(100% - 20px, 1180px);
    padding-top: 16px;
  }

  h1 {
    font-size: 38px;
  }

  .set-grid,
  .set-group-grid,
  .course-grid,
  .account-grid,
  .classification-grid,
  .sprint-grid,
  .advanced-search,
  .help-contact-layout,
  .help-issue-grid,
  .stat-grid,
  .study-time-grid,
  .sync-form,
  .search-row,
    .result-row,
    .filter-row,
    .smart-review-row,
    .deadline-row,
    .countdown-chip {
    grid-template-columns: 1fr;
  }

  .countdown-chip strong {
    text-align: left;
    white-space: normal;
  }

  .top-actions {
    display: flex;
    flex-wrap: nowrap;
    gap: 6px;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: none;
  }

  .top-actions::-webkit-scrollbar {
    display: none;
  }

  .top-actions .sync-badge,
  .top-actions .btn,
  .top-actions .toggle {
    flex: 0 0 auto;
    width: auto;
    min-height: 32px;
    padding: 6px 10px;
    white-space: nowrap;
  }

  .btn,
  .toggle {
    width: 100%;
  }

  .login-layout {
    padding-top: 28px;
  }

  .login-course-strip,
  .home-command-strip,
  .home-library-metrics,
  .year-panel summary,
  .semester-pager,
  .semester-panel-head,
  .login-audit-grid {
    grid-template-columns: 1fr;
  }

  .year-panel summary::before {
    grid-column: 1;
    grid-row: 3;
    justify-self: start;
  }

  .semester-status {
    justify-self: start;
  }

  .login-hero-panel h1 {
    font-size: 40px;
  }

  .home-panel-surface {
    padding: 12px;
  }

  .semester-placeholder {
    align-items: flex-start;
    flex-direction: column;
  }

  .course-tool-surface {
    padding: 12px;
  }

  .course-tool-tabs {
    width: 100%;
    grid-template-columns: 1fr;
  }

  .question-summary-strip {
    grid-template-columns: 1fr 1fr;
  }

  body.topbar-hidden .topbar {
    transform: translateY(calc(-100% - 8px));
  }

  .login-password-hint {
    align-items: flex-start;
    flex-direction: column;
  }

  .inbox-toolbar,
  .inbox-card-head,
  .inbox-enquiry-head {
    align-items: flex-start;
    flex-direction: column;
  }

  .inbox-enquiry-launch,
  .inbox-enquiry-submit-row {
    align-items: flex-start;
    grid-template-columns: 1fr;
  }

  .inbox-enquiry-grid {
    grid-template-columns: 1fr;
  }

  .inbox-enquiry-launch-actions {
    justify-content: stretch;
    width: 100%;
  }

  .inbox-enquiry-launch-actions .btn,
  .inbox-enquiry-submit-row .btn {
    width: 100%;
  }

  .modal-backdrop {
    padding: 64px 10px 16px;
  }

  .modal-panel {
    max-height: calc(100vh - 82px);
  }

  .modal-head {
    grid-template-columns: 1fr;
  }

  .inbox-enquiry-panel-grid {
    grid-template-columns: 1fr;
  }

  .inbox-enquiry-side {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .set-actions {
    display: grid;
  }

  .quick-reference-item {
    padding-left: 12px;
    padding-top: 34px;
  }

  .quick-type {
    top: 8px;
    left: 10px;
  }

  .question-card {
    padding: 16px;
  }

  .option {
    grid-template-columns: 34px minmax(0, 1fr);
  }

  .option-result {
    grid-column: 2;
    justify-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .topbar {
    transition: none;
  }
}