/* Part 3 Revision — mobile-first stylesheet */

:root {
  color-scheme: light dark;
  --bg: #0f1115;
  --bg-elev: #171a21;
  --bg-elev-2: #1f232c;
  --fg: #ecedef;
  --fg-mute: #9aa0aa;
  --fg-dim: #6b7280;
  --line: #262b35;
  --accent: #60a5fa;
  --accent-soft: #1e3a5f;
  --chip-fg: #0a0a0a;
  --shadow: 0 4px 14px rgba(0,0,0,.35);
  --r: 12px;
  --r-sm: 8px;
  --tap: 44px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg: #f7f7f8;
    --bg-elev: #ffffff;
    --bg-elev-2: #f1f2f4;
    --fg: #15171c;
    --fg-mute: #54585f;
    --fg-dim: #8a8f96;
    --line: #e4e6ea;
    --accent: #1d4ed8;
    --accent-soft: #dbeafe;
    --chip-fg: #0a0a0a;
    --shadow: 0 2px 6px rgba(0,0,0,.08);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- Layout chrome ---------- */

.topbar {
  position: sticky; top: 0; z-index: 30;
  display: none; /* hidden on mobile — bottombar takes over */
  align-items: center; gap: 24px;
  padding: 12px 20px;
  background: rgba(15,17,21,.85);
  -webkit-backdrop-filter: saturate(120%) blur(10px);
  backdrop-filter: saturate(120%) blur(10px);
  border-bottom: 1px solid var(--line);
}
@media (prefers-color-scheme: light) {
  .topbar { background: rgba(255,255,255,.85); }
}

.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--fg); }
.brand:hover { text-decoration: none; }
.brand-mark {
  display: inline-grid; place-items: center;
  width: 28px; height: 28px; border-radius: 6px;
  background: var(--accent); color: #fff;
  font-weight: 700; font-size: 12px; letter-spacing: .03em;
}
.brand-name { font-weight: 600; font-size: 15px; }

.topbar-nav { display: flex; gap: 4px; }
.topbar-tab {
  display: inline-flex; align-items: center;
  padding: 8px 14px; border-radius: 999px;
  color: var(--fg-mute); font-size: 14px; font-weight: 500;
}
.topbar-tab:hover { color: var(--fg); text-decoration: none; background: var(--bg-elev); }
.topbar-tab.is-active { color: var(--fg); background: var(--bg-elev-2); }

.bottombar {
  position: fixed; bottom: 0; left: 0; right: 0; z-index: 30;
  display: grid; grid-template-columns: repeat(4, 1fr);
  padding-bottom: env(safe-area-inset-bottom, 0);
  background: rgba(15,17,21,.92);
  -webkit-backdrop-filter: saturate(120%) blur(12px);
  backdrop-filter: saturate(120%) blur(12px);
  border-top: 1px solid var(--line);
}
@media (prefers-color-scheme: light) {
  .bottombar { background: rgba(255,255,255,.92); }
}
.bottombar-tab {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 2px; min-height: var(--tap); padding: 6px 4px 8px;
  color: var(--fg-mute); font-size: 11px; font-weight: 500;
}
.bottombar-tab:hover { text-decoration: none; }
.bottombar-tab.is-active { color: var(--accent); }
.bt-glyph { font-size: 18px; line-height: 1; }
.bt-label { line-height: 1; }

@media (min-width: 720px) {
  .topbar { display: flex; }
  .bottombar { display: none; }
}

.page {
  max-width: 760px;
  margin: 0 auto;
  padding: 18px 16px 96px;
}
@media (min-width: 720px) {
  .page { padding: 28px 24px 48px; }
}

/* ---------- Headings ---------- */

.page-title {
  margin: 4px 0 6px;
  font-size: 26px; font-weight: 700; letter-spacing: -.01em;
}
.page-sub { margin: 0 0 20px; color: var(--fg-mute); font-size: 14px; }

.detail-eyebrow {
  font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  color: var(--fg-mute);
}
.detail-title {
  margin: 4px 0 12px;
  font-size: 24px; font-weight: 700; letter-spacing: -.01em;
}
.detail-head { margin: 6px 0 18px; }
.detail-chips { display: flex; gap: 6px; flex-wrap: wrap; }

.section-title {
  margin: 24px 0 10px;
  font-size: 13px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
  color: var(--fg-mute);
}

.back-link {
  display: inline-flex; align-items: center; min-height: 36px;
  color: var(--fg-mute); font-size: 13px;
}
.back-link:hover { color: var(--fg); }

/* ---------- Day grid ---------- */

.day-grid {
  list-style: none; padding: 0; margin: 0;
  display: grid; gap: 10px;
  grid-template-columns: 1fr;
}
@media (min-width: 560px) {
  .day-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (min-width: 900px) {
  .day-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
}

.day-card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  transition: border-color .15s ease, transform .15s ease;
}
.day-card:hover { border-color: var(--accent); }
.day-card-link {
  display: block; padding: 14px 16px;
  color: var(--fg);
}
.day-card-link:hover { text-decoration: none; }

.day-card-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 10px; margin-bottom: 6px;
}
.day-no {
  font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  color: var(--fg-mute);
}
.day-title {
  margin: 2px 0 8px;
  font-size: 17px; font-weight: 600; line-height: 1.3;
}
.day-gap {
  margin: 0 0 10px;
  font-size: 13px; color: var(--fg-mute);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}
.day-meta { display: flex; gap: 6px; flex-wrap: wrap; }

.day-subtle {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  margin: -2px 0 8px;
}
.topic-pill {
  display: inline-flex; align-items: center;
  padding: 2px 9px; border-radius: 999px;
  background: rgba(96,165,250,.18); color: var(--accent);
  font-size: 11px; font-weight: 600; letter-spacing: .02em;
}
@media (prefers-color-scheme: light) {
  .topic-pill { background: var(--accent-soft); color: var(--accent); }
}
.day-parent-note {
  font-size: 12px; color: var(--fg-mute);
}
.day-parent-note em { font-style: italic; }

/* ---------- Chips & pills ---------- */

.day-chip {
  display: inline-flex; align-items: center;
  padding: 3px 9px; border-radius: 999px;
  color: var(--chip-fg); font-size: 11px; font-weight: 600;
  letter-spacing: .02em;
}
.chip-muted {
  display: inline-flex; align-items: center;
  padding: 3px 9px; border-radius: 999px;
  background: var(--bg-elev-2); color: var(--fg-mute);
  font-size: 11px; font-weight: 500;
}
.day-meta-pill, .meta-pill {
  display: inline-flex; align-items: center;
  padding: 2px 8px; border-radius: 999px;
  background: var(--bg-elev-2); color: var(--fg-mute);
  font-size: 11px; font-weight: 500;
}
.day-meta-pill.open-q { background: rgba(96,165,250,.15); color: var(--accent); }
.meta-pill-day { background: rgba(96,165,250,.15); color: var(--accent); }

/* ---------- Cards / sections ---------- */

.card-block {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 14px 16px;
  margin: 12px 0 4px;
}
.card-block p { margin: 6px 0 0; }
.card-block.accent-open {
  border-color: var(--accent);
  background: var(--bg-elev);
}
.card-label {
  font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase;
  color: var(--fg-mute);
}

.detail-section { margin: 18px 0; }

/* ---------- Source list rows ---------- */

.source-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }

.source-row {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  transition: border-color .15s ease, box-shadow .25s ease;
}
.source-row.is-highlighted {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.source-row-link {
  display: flex; align-items: stretch;
  min-height: var(--tap);
  color: var(--fg);
}
.source-row-link:hover { text-decoration: none; background: var(--bg-elev-2); }

.prio-bar {
  flex: 0 0 4px;
  align-self: stretch;
}
.source-row-body {
  display: flex; flex-direction: column; gap: 4px;
  flex: 1; padding: 10px 12px;
  min-width: 0;
}
.source-row-title {
  font-size: 14px; font-weight: 600; line-height: 1.3;
  overflow-wrap: anywhere;
}
.source-row-meta { display: flex; gap: 6px; flex-wrap: wrap; }
.source-row-arrow {
  flex: 0 0 36px;
  display: grid; place-items: center;
  color: var(--fg-dim); font-size: 22px;
}

/* ---------- Priority groups ---------- */

.prio-group { margin: 12px 0 18px; }
.prio-head {
  display: flex; align-items: center; gap: 10px;
  margin: 0 0 8px;
}
.prio-head .prio-bar {
  flex: 0 0 4px; height: 18px; border-radius: 2px;
}
.prio-title {
  margin: 0; font-size: 14px; font-weight: 600;
  letter-spacing: .02em;
}
.prio-count {
  margin-left: auto; color: var(--fg-mute); font-size: 12px; font-weight: 600;
}

/* ---------- Day badges (on source page) ---------- */

.day-badges {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-wrap: wrap; gap: 6px;
}
.day-badge {
  display: inline-flex; align-items: center;
  min-height: 36px; padding: 4px 12px;
  background: var(--bg-elev); border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--fg); font-size: 13px; font-weight: 500;
}
.day-badge:hover { border-color: var(--accent); text-decoration: none; }
.day-badge.is-active { background: var(--accent); color: #fff; border-color: var(--accent); }

/* ---------- Misc ---------- */

.mono {
  font-family: ui-monospace, SFMono-Regular, "JetBrains Mono", Menlo, monospace;
  font-size: 12px; color: var(--fg-mute);
}
.mono-wrap { overflow-wrap: anywhere; }

.placeholder {
  color: var(--fg-mute); font-style: italic;
  padding: 10px 0;
}

.empty {
  list-style: none;
  color: var(--fg-mute); padding: 20px 0;
}

.banner {
  padding: 10px 12px;
  border-radius: var(--r-sm);
  margin-bottom: 14px;
  font-size: 13px;
}
.banner-warn {
  background: rgba(251,140,0,.12);
  border: 1px solid rgba(251,140,0,.35);
  color: #fb8c00;
}

/* ---------- Prose (markdown) ---------- */

.prose {
  font-size: 15px; line-height: 1.65;
}
.prose h1, .prose h2, .prose h3 {
  margin: 1.4em 0 .4em; letter-spacing: -.005em;
}
.prose h1 { font-size: 22px; }
.prose h2 { font-size: 18px; }
.prose h3 { font-size: 16px; }
.prose p { margin: .8em 0; }
.prose ul, .prose ol { padding-left: 22px; }
.prose li { margin: .2em 0; }
.prose code {
  background: var(--bg-elev-2); padding: 1px 6px;
  border-radius: 4px; font-size: .9em;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.prose pre {
  background: var(--bg-elev-2); padding: 12px 14px;
  border-radius: var(--r-sm); overflow-x: auto;
  font-size: 13px; line-height: 1.55;
}
.prose pre code { background: transparent; padding: 0; }
.prose blockquote {
  margin: 1em 0; padding: 4px 14px;
  border-left: 3px solid var(--line);
  color: var(--fg-mute);
}
.prose table {
  width: 100%; border-collapse: collapse; margin: 1em 0;
  font-size: 14px;
}
.prose th, .prose td {
  padding: 6px 10px;
  border-bottom: 1px solid var(--line); text-align: left;
}
.prose th { font-weight: 600; color: var(--fg); }
.prose a { color: var(--accent); }

/* ---------- Counters (cards landing + session summary) ---------- */

.counter-row {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 8px; margin: 8px 0 14px;
}
.counter-row-4 { grid-template-columns: repeat(4, 1fr); }
.counter {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 12px 10px;
  text-align: center;
  display: flex; flex-direction: column; gap: 2px;
}
.counter-n {
  font-size: 28px; font-weight: 700; letter-spacing: -.02em;
  color: var(--fg);
  font-feature-settings: "tnum";
}
.counter-label {
  font-size: 11px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
  color: var(--fg-mute);
}
.counter-due .counter-n { color: #fb8c00; }
.counter-new .counter-n { color: var(--accent); }

/* ---------- Filter bar (cards + exam) ---------- */

.filter-bar {
  display: flex; gap: 8px; flex-wrap: wrap;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 10px;
  margin: 0 0 14px;
}
.filter-bar-sticky {
  position: sticky; top: 0; z-index: 10;
}
@media (min-width: 720px) {
  .filter-bar-sticky { top: 60px; }
}
.filter-field {
  display: flex; flex-direction: column; gap: 4px;
  flex: 1; min-width: 130px;
}
.filter-field-grow { flex: 2; }
.filter-label {
  font-size: 11px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
  color: var(--fg-mute);
}
.filter-field select,
.filter-field input[type="search"] {
  font: inherit; color: var(--fg);
  background: var(--bg-elev-2);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 8px 10px;
  min-height: var(--tap);
  appearance: none; -webkit-appearance: none;
}
.filter-field select { padding-right: 28px; background-image: linear-gradient(45deg, transparent 50%, var(--fg-mute) 50%), linear-gradient(135deg, var(--fg-mute) 50%, transparent 50%); background-position: calc(100% - 14px) 50%, calc(100% - 10px) 50%; background-size: 4px 4px, 4px 4px; background-repeat: no-repeat; }
.filter-field select:focus, .filter-field input:focus {
  outline: none; border-color: var(--accent);
}
.filter-go {
  align-self: flex-end;
  background: var(--accent); color: #fff;
  border: 0; border-radius: var(--r-sm);
  padding: 0 18px; min-height: var(--tap);
  font: inherit; font-weight: 600;
  cursor: pointer;
}
.filter-clear {
  align-self: flex-end;
  display: inline-flex; align-items: center;
  min-height: var(--tap); padding: 0 12px;
  color: var(--fg-mute); font-size: 13px;
}
.filter-clear:hover { color: var(--fg); text-decoration: none; }

.filter-bar-stacked .filter-field { min-width: 0; flex: 1 1 140px; }
.filter-bar-stacked .filter-actions {
  display: flex; gap: 6px; align-items: flex-end;
  flex: 0 0 auto;
}

/* ---------- Read-state toggle (source detail page) ---------- */

.read-state-toggle {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 6px; margin: 10px 0 18px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 4px;
}
.rs-btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: 0 12px;
  border: 0; border-radius: var(--r-sm);
  background: transparent;
  color: var(--fg-mute);
  font: inherit; font-size: 14px; font-weight: 600;
  cursor: pointer;
  transition: background .15s ease, color .15s ease;
}
.rs-btn:hover { background: var(--bg-elev-2); color: var(--fg); }
.rs-btn.is-active.rs-to_read   { background: var(--bg-elev-2); color: var(--fg); }
.rs-btn.is-active.rs-study_more { background: rgba(251,140,0,.18); color: #fb8c00; }
.rs-btn.is-active.rs-done      { background: rgba(67,160,71,.18);  color: #43a047; }

/* ---------- Read-state chip (list rows) ---------- */

.rs-chip {
  display: inline-flex; align-items: center;
  padding: 2px 8px; border-radius: 999px;
  font-size: 11px; font-weight: 600; letter-spacing: .02em;
}
.rs-chip.rs-study_more { background: rgba(251,140,0,.18); color: #fb8c00; }
.rs-chip.rs-done       { background: rgba(67,160,71,.18); color: #43a047; }
/* rs-to_read is the default — not rendered as a chip in list rows */

/* ---------- Big CTA buttons ---------- */

.cta {
  display: flex; align-items: center; justify-content: center;
  gap: 8px;
  min-height: 54px; padding: 0 18px;
  border-radius: var(--r);
  font-size: 16px; font-weight: 600;
  text-align: center;
}
.cta:hover { text-decoration: none; }
.cta-primary {
  background: var(--accent); color: #fff;
}
.cta-primary:hover { filter: brightness(1.08); }
.cta-ghost {
  background: var(--bg-elev); color: var(--fg);
  border: 1px solid var(--line);
}
.cta-ghost:hover { border-color: var(--accent); color: var(--accent); }
.cta-meta { opacity: .8; font-weight: 500; font-size: 14px; }

.done-actions {
  display: grid; gap: 8px; margin-top: 16px;
}
@media (min-width: 540px) {
  .done-actions { grid-template-columns: 1fr 1fr; }
}

/* ---------- Study card ---------- */

.study-progress {
  display: flex; align-items: center; gap: 10px;
  margin: 6px 0 14px;
}
.study-counter {
  font-size: 13px; font-weight: 600; color: var(--fg-mute);
  font-feature-settings: "tnum";
}
.study-bar {
  flex: 1; height: 3px;
  background: var(--bg-elev-2); border-radius: 999px; overflow: hidden;
}
.study-bar-fill {
  height: 100%; background: var(--accent);
  transition: width .25s ease;
}

.study-card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 22px 18px;
  margin: 0 0 16px;
  min-height: 200px;
  display: flex; flex-direction: column; gap: 18px;
}
.study-question {
  font-size: 19px; font-weight: 500; line-height: 1.45;
  color: var(--fg);
}
.study-answer {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}
.study-answer p { margin: 6px 0 0; font-size: 16px; line-height: 1.6; }
.study-context {
  display: flex; flex-wrap: wrap; gap: 6px;
}

/* ---------- Rating buttons ---------- */

.rating-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}
.rate-btn {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 2px;
  min-height: 64px; padding: 8px;
  border: 0; border-radius: var(--r);
  color: #fff; font: inherit; font-weight: 600;
  cursor: pointer;
  transition: transform .08s ease, filter .15s ease;
}
.rate-btn:hover { filter: brightness(1.1); }
.rate-btn:active { transform: scale(.97); }
.rate-again { background: #e53935; }
.rate-hard  { background: #fb8c00; }
.rate-good  { background: #43a047; }
.rate-easy  { background: #1e88e5; }
.rate-label { font-size: 14px; }
.rate-key {
  font-size: 10px; opacity: .65; letter-spacing: .04em;
  font-weight: 500;
}
.counter.rate-again .counter-n { color: #e53935; }
.counter.rate-hard  .counter-n { color: #fb8c00; }
.counter.rate-good  .counter-n { color: #43a047; }
.counter.rate-easy  .counter-n { color: #1e88e5; }

/* ---------- Exam browser ---------- */

.exam-year {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r);
  margin: 0 0 10px;
  overflow: hidden;
}
.exam-year[open] .exam-year-head { border-bottom: 1px solid var(--line); }
.exam-year-head {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 16px; min-height: var(--tap);
  cursor: pointer; user-select: none;
  list-style: none;
  font-weight: 600; color: var(--fg);
}
.exam-year-head::-webkit-details-marker { display: none; }
.exam-year-head::before {
  content: "▸";
  font-size: 12px; color: var(--fg-mute);
  transition: transform .15s ease;
}
.exam-year[open] .exam-year-head::before { transform: rotate(90deg); }
.exam-year-label { font-size: 16px; }
.exam-year-count { margin-left: auto; color: var(--fg-mute); font-size: 12px; font-weight: 500; }

.exam-file-list { list-style: none; padding: 0; margin: 0; }
.exam-file {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px; min-height: var(--tap);
  border-top: 1px solid var(--line);
}
.exam-file:first-child { border-top: 0; }
.exam-file-meta { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.exam-file-title {
  font-size: 14px; font-weight: 600; line-height: 1.3;
  overflow-wrap: anywhere;
}
.exam-file-sub { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.exam-open {
  flex: 0 0 auto;
  display: inline-flex; align-items: center;
  min-height: var(--tap); padding: 0 14px;
  background: var(--bg-elev-2); color: var(--accent);
  border-radius: var(--r-sm);
  font-size: 13px; font-weight: 600;
}
.exam-open:hover { background: var(--accent); color: #fff; text-decoration: none; }

/* ---------- Source-page PDF embed ---------- */

.source-pdf .pdf-toolbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px;
  margin: 0 0 10px;
}
.cta-compact {
  min-height: var(--tap);
  padding: 0 14px;
  font-size: 14px;
}
.pdf-meta {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; color: var(--fg-mute);
  overflow-wrap: anywhere; min-width: 0;
}
.pdf-frame {
  width: 100%;
  height: 60vh;
  min-height: 380px;
  border: 1px solid var(--line);
  border-radius: var(--r);
  background: var(--bg-elev-2);
}
@media (min-width: 720px) {
  .pdf-frame { height: 70vh; min-height: 540px; }
}

/* ---------- Multi-PDF list ---------- */

.pdf-list {
  list-style: none; padding: 0; margin: 0 0 12px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r);
  overflow: hidden;
  max-height: 220px; overflow-y: auto;
}
.pdf-list-row {
  display: flex; align-items: stretch;
  border-top: 1px solid var(--line);
}
.pdf-list-row:first-child { border-top: 0; }
.pdf-list-row.is-active { background: var(--accent-soft); }

.pdf-row-pick {
  flex: 1; display: flex; align-items: center; gap: 10px;
  padding: 10px 12px;
  background: transparent; border: 0; cursor: pointer;
  color: var(--fg); text-align: left;
  font: inherit; min-height: var(--tap);
  min-width: 0;
}
.pdf-row-pick:hover { background: var(--bg-elev-2); }
.pdf-list-row.is-active .pdf-row-pick { background: transparent; }

.pdf-row-dot {
  flex: 0 0 8px; width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--line);
}
.pdf-list-row.is-active .pdf-row-dot { background: var(--accent); }

.pdf-row-body {
  flex: 1; min-width: 0;
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
}
.pdf-row-title {
  font-size: 13px; line-height: 1.35;
  overflow-wrap: anywhere;
}
.pdf-list-row.is-active .pdf-row-title { font-weight: 600; }

.pdf-row-open {
  flex: 0 0 auto;
  display: inline-flex; align-items: center; justify-content: center;
  min-width: var(--tap); min-height: var(--tap);
  padding: 0 12px;
  color: var(--fg-mute); font-size: 16px;
  border-left: 1px solid var(--line);
}
.pdf-row-open:hover { color: var(--accent); background: var(--bg-elev-2); text-decoration: none; }

/* ---------- Exam source toggle (AA / APEAS) ---------- */

.source-toggle {
  display: flex; gap: 10px;
  margin: 0 0 14px;
  flex-wrap: wrap;
}
.source-pill {
  flex: 1 1 0;
  display: inline-flex; align-items: center; justify-content: center;
  min-height: var(--tap); padding: 0 18px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px; font-weight: 600;
  color: var(--fg-mute);
  text-align: center;
  transition: background .12s ease, color .12s ease, border-color .12s ease, box-shadow .12s ease;
}
.source-pill:hover {
  color: var(--fg);
  background: var(--bg-elev-2);
  text-decoration: none;
}
.source-pill.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 1px 4px rgba(0,0,0,0.22);
}
.source-pill.is-active:hover { color: #fff; background: var(--accent); }

/* ---------- AA sitting layout ---------- */

.exam-year-sub {
  color: var(--fg-mute); font-size: 12px; font-weight: 500;
  margin-left: 4px;
}

.aa-group { padding: 8px 0 6px; border-top: 1px solid var(--line); }
.aa-group:first-of-type { border-top: 0; }
.aa-group-title {
  margin: 0; padding: 6px 16px 4px;
  font-size: 11px; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-mute);
}

.aa-file-list { list-style: none; padding: 0; margin: 0; }

.aa-file-row {
  display: flex; align-items: stretch; gap: 0;
  min-height: var(--tap);
  border-top: 1px solid var(--line);
}
.aa-group .aa-file-list .aa-file-row:first-child { border-top: 0; }
.aa-file-row.is-active { background: var(--accent-soft); }

.aa-row-pick, .aa-row-static {
  flex: 1; min-width: 0;
  display: flex; align-items: center; gap: 12px;
  padding: 10px 16px;
  background: transparent;
  border: 0;
  text-align: left;
  color: var(--fg);
  cursor: default;
}
.aa-row-pick { cursor: pointer; }
.aa-row-pick:hover { background: var(--bg-elev-2); }
.aa-file-row.is-active .aa-row-pick { background: transparent; }
.aa-file-row.is-active .aa-row-title { font-weight: 700; color: var(--accent); }

.aa-badge {
  flex: 0 0 auto;
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 38px; height: 28px;
  padding: 0 8px;
  border-radius: 6px;
  background: var(--bg-elev-2);
  color: var(--fg);
  font-size: 12px; font-weight: 700; letter-spacing: 0.02em;
  font-family: var(--mono, ui-monospace, monospace);
  border: 1px solid var(--line);
}
.aa-file-row.is-active .aa-badge {
  background: var(--accent); color: #fff; border-color: var(--accent);
}

.aa-row-body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 3px; }
.aa-row-title {
  font-size: 14px; font-weight: 600; line-height: 1.3;
  overflow-wrap: anywhere;
}
.aa-row-meta { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.meta-pill-fmt { background: rgba(30,136,229,0.15); color: #1e88e5; }
.meta-pill-doc { background: rgba(120,144,156,0.18); color: var(--fg-mute); }

.aa-row-open, .aa-row-download {
  flex: 0 0 auto;
  display: inline-flex; align-items: center; justify-content: center;
  min-width: var(--tap); min-height: var(--tap);
  padding: 0 12px;
  color: var(--fg-mute); font-size: 16px;
  border-left: 1px solid var(--line);
}
.aa-row-open:hover, .aa-row-download:hover {
  color: var(--accent); background: var(--bg-elev-2); text-decoration: none;
}

.aa-sitting .pdf-toolbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px;
  padding: 10px 16px 6px;
  border-top: 1px solid var(--line);
}
.aa-sitting .pdf-frame {
  margin: 0 12px 12px;
  width: calc(100% - 24px);
}

/* ---------- Topbar user widget ---------- */

.topbar-user {
  display: none;
  align-items: center; gap: 10px;
  margin-left: auto;
  font-size: 13px;
}
@media (min-width: 720px) {
  .topbar-user { display: inline-flex; }
}
.topbar-email {
  color: var(--fg-mute);
  max-width: 180px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.topbar-link {
  display: inline-flex; align-items: center;
  padding: 6px 12px;
  border-radius: 999px;
  background: transparent; border: 1px solid var(--line);
  color: var(--fg-mute);
  font-size: 13px; font-weight: 500;
  cursor: pointer;
}
.topbar-link:hover {
  color: var(--fg); background: var(--bg-elev);
  text-decoration: none;
}
.topbar-link.is-active {
  color: var(--fg); background: var(--bg-elev-2); border-color: var(--bg-elev-2);
}
.topbar-logout { margin: 0; padding: 0; }

/* ---------- Auth pages ---------- */

.auth-card {
  max-width: 420px;
  margin: 32px auto;
  padding: 28px 24px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r);
}
.auth-title { margin: 0 0 6px; font-size: 24px; font-weight: 700; }
.auth-sub { color: var(--fg-mute); font-size: 14px; margin: 0 0 18px; line-height: 1.45; }
.auth-error {
  margin: 0 0 16px; padding: 10px 14px;
  background: rgba(229,57,53,0.12); border: 1px solid rgba(229,57,53,0.4);
  border-radius: var(--r-sm); color: #e53935;
  font-size: 13px;
}
.auth-form { display: flex; flex-direction: column; gap: 14px; }
.auth-field { display: flex; flex-direction: column; gap: 6px; }
.auth-label {
  font-size: 12px; font-weight: 600; color: var(--fg-mute);
  letter-spacing: 0.04em; text-transform: uppercase;
}
.auth-field input {
  height: var(--tap);
  padding: 0 14px;
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
  background: var(--bg);
  color: var(--fg);
  font-size: 15px;
}
.auth-field input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.auth-submit {
  height: var(--tap);
  background: var(--accent); color: #fff;
  border: 0; border-radius: 999px;
  font-size: 15px; font-weight: 600;
  cursor: pointer;
  margin-top: 4px;
}
.auth-submit:hover { filter: brightness(1.06); }
.auth-foot {
  margin: 18px 0 0;
  font-size: 13px; color: var(--fg-mute);
}

/* ---------- Admin page ---------- */

.admin-counts { display: flex; gap: 8px; flex-wrap: wrap; margin: 0 0 18px; }
.admin-count {
  display: inline-flex; align-items: center;
  padding: 6px 12px; border-radius: 999px;
  background: var(--bg-elev); border: 1px solid var(--line);
  color: var(--fg-mute); font-size: 12px; font-weight: 600;
}
.admin-count-pending { color: #fb8c00; border-color: rgba(251,140,0,0.35); }
.admin-count-active { color: #43a047; border-color: rgba(67,160,71,0.35); }
.admin-count-suspended { color: var(--fg-mute); }

.admin-section { margin: 0 0 24px; }

.admin-list { list-style: none; margin: 0; padding: 0; }
.admin-row {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px;
  background: var(--bg-elev); border: 1px solid var(--line);
  border-radius: var(--r-sm);
  margin: 0 0 8px;
}
.admin-row-body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
.admin-row-email { font-weight: 600; font-size: 14px; word-break: break-all; display: inline-flex; gap: 6px; align-items: center; flex-wrap: wrap; }
.admin-row-meta { font-size: 12px; color: var(--fg-mute); }
.admin-action { margin: 0; }
.meta-pill-admin { background: var(--accent); color: #fff; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 36px; padding: 0 16px;
  border-radius: 999px;
  font-size: 13px; font-weight: 600;
  border: 1px solid var(--line);
  cursor: pointer;
}
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { filter: brightness(1.06); }
.btn-ghost { background: var(--bg-elev-2); color: var(--fg); }
.btn-ghost:hover { background: var(--bg); }

/* ---------- Video report (collapsible markdown) ---------- */

.video-report {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r);
  margin: 0 0 10px;
  overflow: hidden;
}
.video-report[open] {
  background: var(--bg);
}
.video-report-head {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 14px; min-height: var(--tap);
  cursor: pointer; user-select: none;
  list-style: none;
  font-weight: 600;
}
.video-report-head::-webkit-details-marker { display: none; }
.video-report-title {
  flex: 1; min-width: 0;
  font-size: 14px;
  overflow-wrap: anywhere;
}
.video-report-chevron {
  font-size: 14px; color: var(--fg-mute);
  transition: transform .15s ease;
}
.video-report[open] .video-report-chevron { transform: rotate(180deg); }
.video-report-body {
  padding: 4px 16px 14px;
  border-top: 1px solid var(--line);
  font-size: 14px;
  line-height: 1.55;
}
.video-report-body h1,
.video-report-body h2,
.video-report-body h3 { margin-top: 18px; }
.video-report-body h1 { font-size: 17px; }
.video-report-body h2 { font-size: 15px; }
.video-report-body h3 { font-size: 14px; color: var(--fg-mute); }

/* ---------- Day status dropdown (day_detail page) ---------- */

.day-status-form {
  display: inline-flex; align-items: center; gap: 8px;
  margin: 0; padding: 0;
}
.day-status-label {
  font-size: 11px; font-weight: 700; letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-mute);
}
.day-status-select {
  -webkit-appearance: none; appearance: none;
  background: var(--bg-elev);
  border: 2px solid var(--line);
  border-radius: 999px;
  padding: 6px 28px 6px 12px;
  font-size: 13px; font-weight: 600;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6' fill='none'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%2399A1AB' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  .day-status-select { color-scheme: light; }
}
.day-status-select:focus {
  outline: none;
  box-shadow: 0 0 0 3px var(--accent-soft);
}