:root {
  color-scheme: dark;
  --bg: #111214;
  --sidebar: #151619;
  --surface: #1b1d20;
  --field: #141619;
  --line: #35383d;
  --text: #f1f2f4;
  --muted: #b0b4bd;
  --accent: #b5c6ff;
  --accent-ink: #182345;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.55;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); }
a { color: inherit; text-decoration: none; }
button, textarea { font: inherit; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
:where(a, button, textarea, summary):focus-visible { outline: 3px solid var(--accent); outline-offset: 4px; }
main:focus { outline: none; }
h1, h2, h3, h4, p { margin: 0; }
h1, h2, h3, h4 { line-height: 1.25; }
h1 { font-size: clamp(1.8rem, 3vw, 2.6rem); letter-spacing: -.045em; font-weight: 650; }
h2 { font-size: 1.25rem; font-weight: 600; letter-spacing: -.02em; }
h3 { font-size: 1.05rem; font-weight: 600; }
h4 { font-size: 1rem; font-weight: 600; }
ul { padding: 0; margin: 0; }
svg { flex-shrink: 0; }
.icon { display: inline-block; vertical-align: middle; }
.preserve-lines { white-space: pre-wrap; overflow-wrap: anywhere; }
.muted, .metric-detail, .field-help { color: var(--muted); }
.quiet-label, .eyebrow { font-size: .7rem; font-weight: 650; letter-spacing: .12em; }
.quiet-label { color: var(--muted); }
.eyebrow { color: var(--accent); margin-bottom: 12px; }
.skip-link { position: fixed; z-index: 5; top: 12px; left: 12px; padding: 12px 20px; background: var(--accent); color: var(--accent-ink); border-radius: 8px; transform: translateY(-180%); }
.skip-link:focus { transform: translateY(0); }
.app-shell { display: grid; grid-template-columns: 234px minmax(0, 1fr); min-height: 100svh; }
.sidebar { background: var(--sidebar); border-right: 1px solid var(--line); padding: 38px 20px 28px; display: flex; flex-direction: column; gap: 40px; min-width: 0; }
.brand { display: flex; align-items: center; gap: 12px; padding-left: 10px; }
.brand-mark { display: grid; place-items: center; width: 38px; height: 38px; border: 1px solid #626e91; border-radius: 11px; color: var(--accent); font-weight: 700; font-size: 1.3rem; }
.brand-name { display: block; font-size: 1rem; letter-spacing: .08em; font-weight: 700; }
.brand-subtitle { display: block; color: var(--muted); font-size: .75rem; }
.primary-nav { display: flex; flex-direction: column; gap: 6px; }
.nav-item { display: flex; align-items: center; gap: 12px; padding: 12px 14px; min-height: 48px; border-radius: 9px; font-size: .9rem; color: var(--muted); }
.nav-item[aria-current="page"] { background: #272b34; color: var(--text); }
.nav-item[aria-current="page"] .icon { color: var(--accent); }
.nav-item[href]:hover { background: #27292e; color: var(--text); }
.unavailable { color: #969ba6; }
.sidebar-note { display: grid; gap: 7px; margin-top: auto; padding: 20px 10px 0; font-size: .8rem; }
.workspace { min-width: 0; padding: 28px 48px 22px; }
.workspace-top { display: flex; justify-content: space-between; align-items: center; gap: 20px; max-width: 1000px; margin: 0 auto; color: var(--muted); font-size: .75rem; }
.year-tag { border: 1px solid var(--line); border-radius: 6px; padding: 4px 9px; white-space: nowrap; }
main { max-width: 1000px; margin: 0 auto; }
.page-header { margin: 48px 0 28px; }
.lead { margin-top: 12px; color: var(--muted); font-size: 1rem; }
.exam-strip { display: flex; align-items: center; gap: 16px; padding: 20px 0 25px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); margin-bottom: 28px; }
.exam-icon { padding: 12px; border: 1px solid var(--line); border-radius: 12px; color: var(--accent); }
.exam-strip p { font-size: 1.15rem; font-weight: 600; margin-top: 3px; }
.exam-note { margin-left: auto; color: var(--muted); font-size: .85rem; }
.dashboard-grid { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 20px; }
.panel { border: 1px solid var(--line); border-radius: 16px; padding: 26px; background: var(--surface); min-width: 0; }
.section-heading { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; margin-bottom: 22px; }
.section-heading p { margin-top: 6px; font-size: .85rem; }
.subtle-badge { display: inline-block; border: 1px solid #4a4d54; padding: 3px 8px; border-radius: 6px; color: var(--muted); font-size: .7rem; }
.metrics-pair { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 18px; }
.metrics-pair .metric + .metric { border-left: 1px solid var(--line); padding-left: 22px; }
.metric { display: flex; flex-direction: column; align-items: flex-start; gap: 7px; }
.metric-label { color: var(--muted); font-size: .85rem; }
.metric-value { font-size: 2.5rem; font-weight: 600; line-height: 1.15; letter-spacing: -.06em; }
.metric-detail { font-size: .75rem; }
.empty-state { text-align: center; padding: 26px 12px; }
.empty-mark { display: inline-flex; padding: 10px; color: var(--muted); background: #27292e; border-radius: 50%; margin-bottom: 14px; }
.empty-state p { max-width: 390px; margin: 9px auto 0; color: var(--muted); font-size: .85rem; }
.today-panel .empty-state { text-align: left; padding: 23px 0; }
.today-panel .empty-mark { display: none; }
.today-panel .empty-state p { margin-left: 0; }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 10px; min-height: 46px; padding: 11px 18px; border: 1px solid transparent; border-radius: 9px; background: var(--accent); color: var(--accent-ink); font-size: .875rem; font-weight: 600; cursor: pointer; text-align: center; overflow-wrap: anywhere; }
.button[href]:hover { background: #cbd6ff; }
.button-secondary { background: transparent; color: var(--text); border-color: #626770; }
.button-secondary[href]:hover { background: #2b2f36; }
.button:disabled { background: #30333a; color: #b8bcc5; border-color: #555b66; cursor: not-allowed; }
.today-panel > .button { width: 100%; }
.progress-panel .metric { margin-top: 30px; }
.progress-empty { padding-top: 24px; margin-top: 28px; border-top: 1px solid var(--line); }
.progress-empty p { margin-top: 8px; font-size: .875rem; color: var(--muted); }
.topics { margin-top: 36px; }
.topic-list { list-style: none; border-top: 1px solid var(--line); }
.topic-list li { display: grid; grid-template-columns: 32px minmax(0, 1fr) auto; align-items: center; gap: 14px; padding: 17px 2px; border-bottom: 1px solid var(--line); }
.topic-index { color: var(--muted); font-size: .75rem; font-variant-numeric: tabular-nums; }
.topic-name { font-size: .9rem; overflow-wrap: anywhere; }
.topic-count { color: var(--muted); font-size: .75rem; white-space: nowrap; }
.app-footer { max-width: 1000px; margin: 40px auto 0; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; color: var(--muted); font-size: .7rem; }
.learning-header { margin-bottom: 32px; }
.learning-card { border: 1px solid var(--line); border-radius: 16px; padding: 32px; background: var(--surface); }
.card-meta { display: flex; align-items: flex-start; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.category-label { color: var(--accent); font-size: .8rem; overflow-wrap: anywhere; max-width: 620px; }
.card-number { font-size: .75rem; color: var(--muted); white-space: nowrap; }
.question { font-size: clamp(1.15rem, 2vw, 1.55rem); font-weight: 600; line-height: 1.5; letter-spacing: -.02em; }
.answer-input { margin-top: 30px; }
.answer-input label { display: block; font-size: .9rem; font-weight: 600; margin-bottom: 6px; }
.field-help { font-size: .8rem; margin-bottom: 12px; }
textarea { display: block; width: 100%; max-width: 100%; min-height: 150px; padding: 16px; border: 1px solid #646975; border-radius: 10px; color: var(--text); background: var(--field); resize: vertical; font-size: 16px; line-height: 1.6; overflow-wrap: anywhere; }
textarea::placeholder { color: #a2a8b4; }
textarea[readonly] { background: #17191c; }
.card-actions { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; margin-top: 22px; }
.card-actions .muted { font-size: .8rem; }
.solution, .recognition, .self-rating { margin-top: 32px; padding-top: 28px; border-top: 1px solid var(--line); }
.solution .section-heading { margin-bottom: 16px; }
.model-answer { font-size: 1rem; line-height: 1.75; }
.solution h4 { margin: 24px 0 14px; }
.key-points { list-style: disc; padding-left: 22px; }
.key-points li { padding: 4px 0 4px 3px; font-size: .9rem; }
.key-points li::marker { color: var(--accent); }
.recognition > .muted { font-size: .8rem; margin: 10px 0 20px; }
.recognition-group { margin-top: 20px; }
.recognition-heading { display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.requirement { color: var(--muted); font-size: .8rem; }
.recognition-list { list-style: none; margin-top: 14px; }
.recognition-list li { display: grid; grid-template-columns: 146px minmax(0, 1fr); gap: 14px; padding: 14px 0; border-bottom: 1px solid var(--line); align-items: start; font-size: .85rem; }
.recognition-list .muted { margin-top: 6px; font-size: .8rem; }
.status { display: inline-flex; width: fit-content; border: 1px solid; border-radius: 6px; font-size: .7rem; padding: 3px 7px; }
.status-recognized { color: #a5dbc2; background: #202e29; border-color: #537b67; }
.status-missing { color: #e4c89f; background: #302a23; border-color: #8a7355; }
.status-manual { color: #c4cbf1; background: #272b39; border-color: #6b7398; }
.notice { display: flex; gap: 14px; padding: 20px; border: 1px solid #68624b; border-radius: 10px; background: #25241f; margin-top: 24px; min-width: 0; }
.notice-icon { color: #dfce9c; }
.notice > div:last-child { min-width: 0; }
.notice h3 { font-size: .9rem; margin-bottom: 9px; }
.notice p { font-size: .85rem; color: #d7d3c4; line-height: 1.7; }
.original-text { margin-top: 26px; border: 1px solid var(--line); border-radius: 10px; }
summary { padding: 14px 18px; min-height: 48px; cursor: pointer; font-size: .9rem; }
.original-text > div { border-top: 1px solid var(--line); padding: 20px; }
.original-text p { margin: 12px 0 20px; font-size: .9rem; }
.original-text p:last-child { margin-bottom: 0; }
.self-rating > .muted { margin-top: 8px; font-size: .8rem; }
.rating-buttons { margin-top: 18px; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.messages { margin-top: 24px; }
@media (max-width: 1050px) {
  .app-shell { grid-template-columns: 204px minmax(0, 1fr); }
  .workspace { padding: 25px 28px; }
  .dashboard-grid { grid-template-columns: minmax(0, 1fr); }
  .progress-panel .metric { margin-top: 0; }
  .progress-empty { margin-top: 20px; }
}
@media (max-width: 720px) {
  .app-shell { grid-template-columns: minmax(0, 1fr); }
  .sidebar { border-right: 0; border-bottom: 1px solid var(--line); padding: 20px max(16px, env(safe-area-inset-right)) 12px max(16px, env(safe-area-inset-left)); gap: 18px; }
  .brand { padding-left: 0; }
  .brand-mark { width: 34px; height: 34px; }
  .primary-nav { flex-direction: row; gap: 4px; }
  .nav-item { flex: 1; justify-content: center; padding: 10px 7px; gap: 7px; font-size: .75rem; }
  .nav-item .icon { width: 17px; height: 17px; }
  .sidebar-note { display: none; }
  .workspace { padding: 18px max(16px, env(safe-area-inset-right)) max(24px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left)); }
  .workspace-top { gap: 12px; font-size: .65rem; align-items: flex-start; }
  .page-header { margin-top: 30px; margin-bottom: 22px; }
  .exam-strip { gap: 12px; padding: 18px 0; margin-bottom: 22px; }
  .exam-note { display: none; }
  .panel { padding: 22px; border-radius: 13px; }
  .section-heading { gap: 10px; margin-bottom: 20px; }
  .metric-value { font-size: 2.25rem; }
  .metrics-pair { gap: 12px; }
  .metrics-pair .metric + .metric { padding-left: 16px; }
  .topics { margin-top: 30px; }
  .topic-list li { grid-template-columns: 24px minmax(0, 1fr); gap: 10px; }
  .topic-count { grid-column: 2; margin-top: -7px; }
  .topic-name { font-size: .875rem; }
  .learning-card { padding: 22px; border-radius: 13px; }
  .card-meta { flex-direction: column; gap: 8px; margin-bottom: 20px; }
  .answer-input { margin-top: 24px; }
  .card-actions { gap: 12px; }
  .card-actions .button { width: 100%; }
  .recognition-list li { grid-template-columns: minmax(0, 1fr); gap: 8px; }
  .notice { padding: 16px; gap: 10px; }
  .rating-buttons { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .rating-buttons .button { padding: 11px 8px; }
}
@media (max-width: 359px) {
  .nav-item { gap: 5px; padding-inline: 5px; }
  .nav-item .icon { width: 15px; height: 15px; }
  .panel, .learning-card { padding: 18px; }
  .subtle-badge { font-size: .65rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}