/* ============================================================
   AAIA Study Guide — shared design system
   isaca.justsimple.online
   ============================================================ */

:root {
  --navy: #0b1f3a;
  --navy-2: #122a4d;
  --ink: #15233b;
  --teal: #0e8c8c;
  --teal-d: #0a6f6f;
  --amber: #e0a106;
  --amber-d: #b87f00;
  --red: #c0392b;
  --green: #1f9254;
  --paper: #f6f8fb;
  --card: #ffffff;
  --line: #dde4ee;
  --muted: #5d6b80;
  --text: #1d2a40;
  --shadow: 0 1px 2px rgba(11,31,58,.06), 0 8px 24px rgba(11,31,58,.06);
  --shadow-lg: 0 20px 50px rgba(11,31,58,.16);
  --radius: 14px;
  --maxw: 1180px;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  background: var(--paper);
  line-height: 1.65;
  font-size: 17px;
}
img { max-width: 100%; }
a { color: var(--teal-d); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- layout ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
.layout { display: grid; grid-template-columns: 256px 1fr; gap: 38px; max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
main { min-width: 0; padding: 30px 0 90px; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(11,31,58,.96);
  backdrop-filter: saturate(140%) blur(8px);
  color: #fff; border-bottom: 1px solid rgba(255,255,255,.08);
}
.topbar .wrap { display: flex; align-items: center; gap: 16px; height: 60px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 800; color: #fff; letter-spacing: .2px; }
.brand:hover { text-decoration: none; }
.brand .mark {
  width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--teal), var(--amber)); color: #04121f; font-weight: 900; font-size: 15px;
}
.brand small { display: block; font-weight: 500; font-size: 11px; color: #9fb3cc; letter-spacing: .5px; }
.topnav { margin-left: auto; display: flex; gap: 4px; flex-wrap: wrap; }
.topnav a { color: #c7d4e6; padding: 7px 11px; border-radius: 8px; font-size: 14px; font-weight: 600; }
.topnav a:hover { background: rgba(255,255,255,.08); color: #fff; text-decoration: none; }
.topnav a.active { background: var(--teal); color: #fff; }
.menu-btn { display: none; margin-left: auto; background: rgba(255,255,255,.1); color: #fff; border: 0; width: 42px; height: 38px; border-radius: 9px; font-size: 20px; cursor: pointer; }

/* ---------- sidebar ---------- */
.sidebar { padding-top: 30px; }
.sidebar .sticky { position: sticky; top: 80px; }
.sidebar h4 { font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--muted); margin: 18px 0 8px; }
.sidebar nav a {
  display: block; padding: 7px 12px; border-radius: 9px; color: var(--ink); font-size: 14.5px; font-weight: 600;
  border-left: 3px solid transparent;
}
.sidebar nav a:hover { background: #eef2f8; text-decoration: none; }
.sidebar nav a.active { background: #e7f2f2; color: var(--teal-d); border-left-color: var(--teal); }
.sidebar .prog { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px; box-shadow: var(--shadow); }
.sidebar .prog .bar { height: 9px; background: #e8edf4; border-radius: 99px; overflow: hidden; margin: 8px 0 6px; }
.sidebar .prog .bar > i { display: block; height: 100%; width: 0; background: linear-gradient(90deg, var(--teal), var(--amber)); transition: width .4s ease; }
.sidebar .prog small { color: var(--muted); }

/* ---------- hero ---------- */
.hero { background: radial-gradient(1200px 500px at 80% -10%, #173a63 0%, var(--navy) 55%); color: #eaf1fb; }
.hero .wrap { padding: 64px 22px 70px; }
.hero .eyebrow { display: inline-block; background: rgba(224,161,6,.16); color: var(--amber); font-weight: 700; font-size: 13px; letter-spacing: .08em; text-transform: uppercase; padding: 6px 13px; border-radius: 99px; }
.hero h1 { font-family: var(--serif); font-size: clamp(33px, 5vw, 54px); line-height: 1.08; margin: 16px 0 12px; color: #fff; }
.hero p.lead { font-size: 19px; color: #c4d3e8; max-width: 720px; }
.hero .cta { margin-top: 26px; display: flex; gap: 12px; flex-wrap: wrap; }
.hero .stats { margin-top: 40px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; max-width: 760px; }
.hero .stat { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1); border-radius: 12px; padding: 16px; }
.hero .stat b { display: block; font-size: 26px; color: #fff; font-family: var(--serif); }
.hero .stat span { font-size: 13px; color: #9fb3cc; }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 20px; border-radius: 11px; font-weight: 700; font-size: 15px; cursor: pointer; border: 0; transition: transform .08s ease, box-shadow .2s; }
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: linear-gradient(135deg, var(--teal), var(--teal-d)); color: #fff; box-shadow: 0 8px 20px rgba(14,140,140,.3); }
.btn-amber { background: linear-gradient(135deg, var(--amber), var(--amber-d)); color: #20160a; box-shadow: 0 8px 20px rgba(224,161,6,.3); }
.btn-ghost { background: rgba(255,255,255,.08); color: #fff; border: 1px solid rgba(255,255,255,.22); }
.btn-ghost:hover { background: rgba(255,255,255,.16); }
.btn-outline { background: #fff; color: var(--teal-d); border: 1.5px solid var(--teal); }

/* ---------- typography in main ---------- */
main h1, .page-head h1 { font-family: var(--serif); font-size: clamp(28px, 4vw, 40px); line-height: 1.12; margin: 0 0 10px; color: var(--ink); }
main h2 { font-family: var(--serif); font-size: 26px; margin: 40px 0 12px; color: var(--ink); scroll-margin-top: 80px; padding-bottom: 8px; border-bottom: 2px solid var(--line); }
main h3 { font-size: 20px; margin: 28px 0 8px; color: var(--navy-2); scroll-margin-top: 80px; }
main h4 { font-size: 16px; margin: 20px 0 6px; color: var(--navy-2); }
main p { margin: 0 0 14px; }
main ul, main ol { margin: 0 0 16px; padding-left: 22px; }
main li { margin: 6px 0; }
main strong { color: var(--ink); }
code { font-family: var(--mono); background: #eef2f8; padding: 1px 6px; border-radius: 5px; font-size: .9em; color: #0a4b4b; }

.page-head { margin-bottom: 8px; }
.page-head .eyebrow { display: inline-block; color: var(--teal-d); font-weight: 700; font-size: 13px; letter-spacing: .08em; text-transform: uppercase; }
.page-head .lead { font-size: 18px; color: var(--muted); margin-top: 6px; }
.weight-pill { display: inline-block; background: var(--navy); color: #fff; font-weight: 700; font-size: 13px; padding: 4px 12px; border-radius: 99px; vertical-align: middle; margin-left: 8px; }

/* ---------- cards / grid ---------- */
.grid { display: grid; gap: 18px; }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.card.link { transition: transform .12s ease, box-shadow .2s; display: block; color: inherit; }
.card.link:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); text-decoration: none; }
.card .tag { font-size: 12px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; color: var(--teal-d); }
.card h3 { margin: 6px 0 8px; }
.card p { color: var(--muted); margin: 0; font-size: 15px; }

/* domain accent cards */
.dcard { border-top: 4px solid var(--teal); }
.dcard.d1 { border-top-color: var(--teal); }
.dcard.d2 { border-top-color: var(--amber); }
.dcard.d3 { border-top-color: #6a5acd; }
.dcard .pct { font-family: var(--serif); font-size: 40px; line-height: 1; color: var(--ink); }

/* ---------- callouts ---------- */
.callout { border-radius: 12px; padding: 16px 18px; margin: 18px 0; border: 1px solid; display: flex; gap: 12px; }
.callout .ico { font-size: 20px; line-height: 1.3; }
.callout p:last-child { margin-bottom: 0; }
.callout b { display: block; margin-bottom: 2px; }
.callout.tip { background: #e9f6f1; border-color: #b8e2cf; }
.callout.tip b { color: var(--green); }
.callout.warn { background: #fdf3e3; border-color: #f3dcad; }
.callout.warn b { color: var(--amber-d); }
.callout.key { background: #eef4fb; border-color: #caddf2; }
.callout.key b { color: var(--navy-2); }
.callout.exam { background: #fdecea; border-color: #f5c6bf; }
.callout.exam b { color: var(--red); }

/* example box */
.example { background: linear-gradient(180deg,#fbfdff,#f4f8fd); border: 1px solid var(--line); border-left: 4px solid var(--amber); border-radius: 12px; padding: 18px 20px; margin: 20px 0; }
.example .label { font-size: 12px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; color: var(--amber-d); }
.example h4 { margin: 4px 0 8px; }
.example .ans { margin-top: 12px; padding-top: 12px; border-top: 1px dashed var(--line); }
.example .ans b { color: var(--green); }

/* ---------- tables ---------- */
.table-wrap { overflow-x: auto; margin: 18px 0; border: 1px solid var(--line); border-radius: 12px; }
table { border-collapse: collapse; width: 100%; font-size: 15px; background: var(--card); }
th, td { text-align: left; padding: 11px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: #f0f4fa; font-weight: 700; color: var(--ink); font-size: 13.5px; letter-spacing: .02em; }
tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: #f8fafd; }

/* ---------- checklist (study plan) ---------- */
.check { list-style: none; padding: 0; margin: 12px 0; }
.check li { display: flex; gap: 12px; align-items: flex-start; padding: 11px 14px; border: 1px solid var(--line); border-radius: 11px; margin: 8px 0; background: var(--card); transition: background .15s; }
.check li.done { background: #f0f8f3; border-color: #cbe8d8; }
.check input[type=checkbox] { width: 20px; height: 20px; margin-top: 2px; accent-color: var(--teal); cursor: pointer; flex: none; }
.check li.done label { text-decoration: line-through; color: var(--muted); }
.check label { cursor: pointer; }

.week { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 4px 20px 18px; margin: 18px 0; box-shadow: var(--shadow); }
.week > summary { cursor: pointer; list-style: none; padding: 16px 0 12px; font-family: var(--serif); font-size: 21px; color: var(--ink); display: flex; align-items: center; gap: 12px; }
.week > summary::-webkit-details-marker { display: none; }
.week > summary .num { background: var(--navy); color: #fff; width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center; font-size: 15px; font-weight: 800; flex: none; }
.week > summary .focus { font-family: var(--sans); font-size: 13px; color: var(--muted); font-weight: 600; margin-left: auto; }

/* ---------- quiz ---------- */
.quiz-head { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; box-shadow: var(--shadow); display: flex; flex-wrap: wrap; gap: 16px; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.quiz-head .score { font-family: var(--serif); font-size: 30px; color: var(--ink); }
.filters { display: flex; gap: 8px; flex-wrap: wrap; }
.filters button { background: #eef2f8; border: 1px solid var(--line); color: var(--ink); padding: 7px 13px; border-radius: 99px; font-weight: 600; font-size: 14px; cursor: pointer; }
.filters button.active { background: var(--navy); color: #fff; border-color: var(--navy); }
.q { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px 22px; box-shadow: var(--shadow); margin: 14px 0; }
.q .qmeta { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: .05em; color: var(--teal-d); margin-bottom: 6px; }
.q .stem { font-weight: 600; margin-bottom: 12px; }
.q .opts { list-style: none; padding: 0; margin: 0; }
.q .opt { display: flex; gap: 10px; padding: 11px 14px; border: 1.5px solid var(--line); border-radius: 11px; margin: 8px 0; cursor: pointer; transition: all .12s; }
.q .opt:hover { border-color: var(--teal); background: #f4fbfb; }
.q .opt .ltr { font-weight: 800; color: var(--muted); flex: none; }
.q .opt.correct { border-color: var(--green); background: #eef8f1; }
.q .opt.wrong { border-color: var(--red); background: #fdeeec; }
.q .opt.correct .ltr { color: var(--green); }
.q .opt.wrong .ltr { color: var(--red); }
.q .explain { display: none; margin-top: 12px; padding: 14px 16px; background: #eef4fb; border: 1px solid #caddf2; border-radius: 11px; font-size: 15px; }
.q.answered .explain { display: block; }
.q .explain b { color: var(--navy-2); }

/* ---------- misc ---------- */
.kbd-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.chip { background: #eef2f8; border: 1px solid var(--line); border-radius: 99px; padding: 5px 13px; font-size: 14px; font-weight: 600; color: var(--ink); }
.toc { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 20px; box-shadow: var(--shadow); margin: 0 0 24px; }
.toc b { font-size: 13px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.toc ul { columns: 2; margin: 8px 0 0; padding-left: 18px; }
.toc a { font-weight: 600; }
.pager { display: flex; justify-content: space-between; gap: 14px; margin-top: 50px; padding-top: 24px; border-top: 1px solid var(--line); }
.pager a { flex: 1; padding: 16px 20px; border: 1px solid var(--line); border-radius: 12px; background: var(--card); box-shadow: var(--shadow); }
.pager a:hover { text-decoration: none; border-color: var(--teal); }
.pager a span { display: block; font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.pager a b { color: var(--ink); }
.pager a.next { text-align: right; }

/* glossary */
.gl-search { width: 100%; padding: 13px 16px; border: 1.5px solid var(--line); border-radius: 12px; font-size: 16px; margin-bottom: 18px; }
.gl-search:focus { outline: none; border-color: var(--teal); }
.term { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px 18px; margin: 10px 0; box-shadow: var(--shadow); }
.term dt { font-weight: 800; color: var(--ink); font-size: 17px; }
.term dd { margin: 4px 0 0; color: var(--text); }
.term .src { font-size: 12px; color: var(--muted); font-weight: 600; }

/* ---------- footer ---------- */
footer.site { background: var(--navy); color: #b8c6dc; margin-top: 40px; }
footer.site .wrap { padding: 40px 22px; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 30px; }
footer.site h5 { color: #fff; font-size: 14px; margin: 0 0 10px; letter-spacing: .03em; }
footer.site a { color: #b8c6dc; display: block; padding: 3px 0; font-size: 14px; }
footer.site a:hover { color: #fff; }
footer.site .fine { border-top: 1px solid rgba(255,255,255,.1); margin-top: 10px; padding: 16px 22px; font-size: 12.5px; color: #8499b5; text-align: center; }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; gap: 0; }
  .sidebar { position: fixed; inset: 60px 0 auto 0; background: var(--card); z-index: 40; border-bottom: 1px solid var(--line); max-height: 70vh; overflow:auto; padding: 14px 22px 22px; box-shadow: var(--shadow-lg); transform: translateY(-120%); transition: transform .25s; }
  .sidebar.open { transform: translateY(0); }
  .sidebar .sticky { position: static; }
  .topnav { display: none; }
  .menu-btn { display: block; }
  .grid.cols-3, .grid.cols-2 { grid-template-columns: 1fr; }
  .hero .stats { grid-template-columns: repeat(2,1fr); }
  .toc ul { columns: 1; }
  footer.site .wrap { grid-template-columns: 1fr; }
  .pager { flex-direction: column; }
}

/* ============================================================
   Theme toggle button
   ============================================================ */
.theme-btn { background: rgba(255,255,255,.1); color: #fff; border: 0; width: 42px; height: 38px; border-radius: 9px; font-size: 18px; cursor: pointer; margin-left: 10px; line-height: 1; }
.theme-btn:hover { background: rgba(255,255,255,.2); }
@media (max-width: 900px) { .theme-btn { margin-left: auto; } .theme-btn + .menu-btn { margin-left: 8px; } }

/* ============================================================
   Dark theme — overrides via [data-theme="dark"]
   ============================================================ */
[data-theme="dark"] {
  --paper: #0c1422;
  --card: #15213a;
  --ink: #eef3fb;
  --text: #c9d6ea;
  --muted: #93a4c0;
  --line: #27344e;
  --navy: #0a1424;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 24px rgba(0,0,0,.35);
  --shadow-lg: 0 20px 50px rgba(0,0,0,.5);
}
[data-theme="dark"] body { background: var(--paper); color: var(--text); }
[data-theme="dark"] main h1, [data-theme="dark"] main h2,
[data-theme="dark"] main h3, [data-theme="dark"] main h4,
[data-theme="dark"] .page-head h1, [data-theme="dark"] main strong,
[data-theme="dark"] .card h3, [data-theme="dark"] .term dt,
[data-theme="dark"] .week > summary, [data-theme="dark"] .quiz-head .score,
[data-theme="dark"] .dcard .pct, [data-theme="dark"] .hero h1 { color: var(--ink); }
[data-theme="dark"] a { color: #5fd0d0; }
[data-theme="dark"] code { background: #0e1a2e; color: #6fe0e0; }

/* component surfaces that used hard-coded light colors */
[data-theme="dark"] th { background: #1b2a47; color: var(--ink); }
[data-theme="dark"] tbody tr:hover { background: #1a2740; }
[data-theme="dark"] .sidebar nav a { color: var(--text); }
[data-theme="dark"] .sidebar nav a:hover { background: #1b2942; }
[data-theme="dark"] .sidebar nav a.active { background: #123535; color: #6fe0e0; }
[data-theme="dark"] .sidebar .prog .bar { background: #233149; }
[data-theme="dark"] .filters button { background: #1b2942; color: var(--text); border-color: var(--line); }
[data-theme="dark"] .filters button.active { background: #5fd0d0; color: #06121f; border-color: #5fd0d0; }
[data-theme="dark"] .q .opt:hover { background: #15263b; border-color: var(--teal); }
[data-theme="dark"] .q .opt.correct { background: #11331f; border-color: #2a8a52; }
[data-theme="dark"] .q .opt.wrong { background: #3a1614; border-color: #b3443a; }
[data-theme="dark"] .q .explain { background: #11203a; border-color: #29476f; }
[data-theme="dark"] .example { background: linear-gradient(180deg,#16243d,#121d31); border-left-color: var(--amber); }
[data-theme="dark"] .callout.tip { background: #11281f; border-color: #1f4d36; }
[data-theme="dark"] .callout.warn { background: #2c2310; border-color: #5a4715; }
[data-theme="dark"] .callout.key { background: #122035; border-color: #284a73; }
[data-theme="dark"] .callout.exam { background: #321714; border-color: #6a2b22; }
[data-theme="dark"] .chip, [data-theme="dark"] .gl-search { background: #1b2942; color: var(--text); border-color: var(--line); }
[data-theme="dark"] .pager a:hover { border-color: var(--teal); }
[data-theme="dark"] .check li.done { background: #11281f; border-color: #1f4d36; }
[data-theme="dark"] .toc ul a, [data-theme="dark"] .pager a b { color: var(--ink); }
[data-theme="dark"] .btn-outline { background: var(--card); color: #6fe0e0; border-color: var(--teal); }

/* ============================================================
   Print styles (cheat sheet & any page)
   ============================================================ */
@media print {
  .topbar, .sidebar, footer.site, .pager, .menu-btn, .theme-btn, .filters, [data-reset-quiz], [data-reset-progress], .hero .cta { display: none !important; }
  body { background: #fff; color: #000; font-size: 11.5px; line-height: 1.4; }
  .layout { display: block; padding: 0; }
  main { padding: 0; }
  .wrap { padding: 0; }
  .card, .callout, .example, .week, .term, .table-wrap { box-shadow: none; break-inside: avoid; }
  a { color: #000; text-decoration: none; }
  h2 { break-after: avoid; }
  .cheat-grid { display: grid !important; grid-template-columns: 1fr 1fr; gap: 10px; }
  .cheat-grid .card { padding: 10px 12px; }
  @page { margin: 12mm; }
}

/* ============================================================
   Score tracker badges
   ============================================================ */
.qbadge { display:inline-block; margin-left:10px; font-size:11px; font-weight:800; padding:2px 8px; border-radius:99px; letter-spacing:.02em; }
.qbadge.ok { background:#e6f6ec; color:var(--green); }
.qbadge.bad { background:#fdecea; color:var(--red); }
[data-theme="dark"] .qbadge.ok { background:#11331f; }
[data-theme="dark"] .qbadge.bad { background:#3a1614; }
.statline { color:var(--muted); font-size:14px; margin:0 0 14px; }

/* ============================================================
   Mock exam
   ============================================================ */
.mock-setup .opt-row { display:flex; gap:12px; flex-wrap:wrap; margin:16px 0; }
.mock-setup .len-btn { flex:1; min-width:150px; text-align:left; background:var(--card); border:1.5px solid var(--line); border-radius:12px; padding:16px 18px; cursor:pointer; box-shadow:var(--shadow); transition:border-color .12s, transform .08s; }
.mock-setup .len-btn:hover { border-color:var(--teal); transform:translateY(-2px); }
.mock-setup .len-btn b { display:block; font-family:var(--serif); font-size:22px; color:var(--ink); }
.mock-setup .len-btn span { font-size:13px; color:var(--muted); }
.mock-bar { position:sticky; top:60px; z-index:30; background:var(--navy); color:#fff; border-radius:12px; padding:12px 18px; display:flex; align-items:center; gap:16px; box-shadow:var(--shadow-lg); margin-bottom:18px; flex-wrap:wrap; }
.mock-bar [data-timer] { font-family:var(--mono); font-size:26px; font-weight:700; min-width:84px; }
.mock-bar [data-timer].low { color:#ff8a7a; animation:pulse 1s infinite; }
@keyframes pulse { 50% { opacity:.5; } }
.mock-bar [data-mprog] { color:#c7d4e6; font-size:14px; }
.mock-bar .spacer { margin-left:auto; }
.mock-bar .btn { padding:10px 20px; }
#mock-questions .q .opt.chosen { border-color:var(--teal); background:#e7f6f6; }
[data-theme="dark"] #mock-questions .q .opt.chosen { background:#15364a; }
#mock-app:not(.graded) #mock-questions .explain { display:none; }
#mock-app.graded #mock-questions .q.answered .explain { display:block; }
.mock-result { margin-top:24px; }
.score-big { font-family:var(--serif); font-size:64px; line-height:1; margin:6px 0 10px; }
.score-big.pass { color:var(--green); }
.score-big.fail { color:var(--red); }

/* ============================================================
   Flashcards
   ============================================================ */
.fc-toolbar { display:flex; gap:10px; flex-wrap:wrap; align-items:center; margin-bottom:18px; }
.fc-toolbar .btn { padding:10px 16px; }
.fc-toolbar .grow { margin-left:auto; }
.fc-check { display:flex; align-items:center; gap:7px; font-size:14px; font-weight:600; color:var(--muted); cursor:pointer; }
.fc-check input { width:18px; height:18px; accent-color:var(--teal); }
.flashcard { perspective:1400px; height:340px; cursor:pointer; margin:0 auto; max-width:680px; }
.flashcard .fc-inner { position:relative; width:100%; height:100%; transition:transform .5s; transform-style:preserve-3d; }
.flashcard.flipped .fc-inner { transform:rotateY(180deg); }
.flashcard .fc-face { position:absolute; inset:0; backface-visibility:hidden; -webkit-backface-visibility:hidden; border-radius:18px; border:1px solid var(--line); box-shadow:var(--shadow-lg); padding:30px; display:flex; flex-direction:column; align-items:center; justify-content:center; text-align:center; }
.flashcard .fc-front { background:linear-gradient(160deg,#16314f,var(--navy)); color:#fff; }
.flashcard .fc-back { background:var(--card); color:var(--text); transform:rotateY(180deg); overflow:auto; }
.flashcard.empty .fc-face { position:static; transform:none; background:var(--card); color:var(--text); height:100%; }
.fc-hint { position:absolute; top:14px; left:18px; font-size:11px; text-transform:uppercase; letter-spacing:.1em; opacity:.6; font-weight:700; }
.fc-term { font-family:var(--serif); font-size:34px; line-height:1.15; }
.fc-def { font-size:18px; line-height:1.55; }
.fc-known-tag { position:absolute; top:14px; right:18px; font-size:12px; font-weight:800; color:#9ff0c4; }
.flashcard.is-known .fc-front { background:linear-gradient(160deg,#13502f,#0c3a22); }
.fc-counter { text-align:center; color:var(--muted); margin-top:14px; font-weight:600; }
@media (max-width:600px){ .fc-term{font-size:27px;} .flashcard{height:300px;} }

/* ============================================================
   Animations & micro-topic components
   ============================================================ */

/* scroll progress bar (created by app.js) */
.scroll-prog { position:fixed; top:0; left:0; right:0; height:3px; z-index:60; background:transparent; pointer-events:none; }
.scroll-prog > i { display:block; height:100%; width:0; background:linear-gradient(90deg,var(--teal),var(--amber)); transition:width .1s linear; }

/* scroll reveal */
.reveal { opacity:0; transform:translateY(20px); transition:opacity .6s cubic-bezier(.2,.7,.3,1), transform .6s cubic-bezier(.2,.7,.3,1); will-change:opacity,transform; }
.reveal.in { opacity:1; transform:none; }
.reveal.d1 { transition-delay:.08s; } .reveal.d2 { transition-delay:.16s; } .reveal.d3 { transition-delay:.24s; }

/* micro-topic accordion */
details.acc { border:1px solid var(--line); border-radius:13px; margin:14px 0; background:var(--card); box-shadow:var(--shadow); overflow:hidden; transition:box-shadow .2s, border-color .2s; }
details.acc[open] { box-shadow:var(--shadow-lg); border-color:#bfe0e0; }
details.acc > summary { cursor:pointer; list-style:none; padding:16px 20px; font-weight:700; font-size:17px; color:var(--ink); display:flex; align-items:center; gap:12px; }
details.acc > summary::-webkit-details-marker { display:none; }
details.acc > summary:hover { background:#f5f9fc; }
[data-theme="dark"] details.acc > summary:hover { background:#192741; }
details.acc > summary::after { content:"+"; margin-left:auto; font-size:24px; font-weight:400; color:var(--teal-d); transition:transform .3s ease; line-height:1; flex:none; }
details.acc[open] > summary::after { transform:rotate(135deg); }
.mt-num { flex:none; width:30px; height:30px; border-radius:8px; background:linear-gradient(135deg,var(--navy),var(--navy-2)); color:#fff; display:grid; place-items:center; font-size:13px; font-weight:800; }
.mt-tag { flex:none; font-size:10.5px; font-weight:800; text-transform:uppercase; letter-spacing:.05em; color:#fff; background:var(--teal); padding:3px 9px; border-radius:99px; }
.acc-body { padding:2px 20px 20px; }
.acc-body > * { animation:none; }
details.acc[open] .acc-body > * { animation:accIn .45s ease both; }
details.acc[open] .acc-body > *:nth-child(2){animation-delay:.04s}
details.acc[open] .acc-body > *:nth-child(3){animation-delay:.08s}
details.acc[open] .acc-body > *:nth-child(4){animation-delay:.12s}
details.acc[open] .acc-body > *:nth-child(n+5){animation-delay:.16s}
@keyframes accIn { from{opacity:0; transform:translateY(-10px);} to{opacity:1; transform:none;} }

/* step-by-step timeline */
ol.steps { list-style:none; counter-reset:step; padding:0; margin:18px 0 6px; }
ol.steps > li { position:relative; padding:0 0 20px 54px; }
ol.steps > li::before { counter-increment:step; content:counter(step); position:absolute; left:0; top:-2px; width:36px; height:36px; border-radius:50%; background:linear-gradient(135deg,var(--teal),var(--teal-d)); color:#fff; font-weight:800; font-size:15px; display:grid; place-items:center; box-shadow:0 4px 12px rgba(14,140,140,.32); z-index:1; }
ol.steps > li::after { content:""; position:absolute; left:17px; top:34px; bottom:0; width:2px; background:linear-gradient(var(--teal),var(--line)); }
ol.steps > li:last-child { padding-bottom:0; }
ol.steps > li:last-child::after { display:none; }
ol.steps > li b { display:block; color:var(--ink); margin-bottom:3px; font-size:15.5px; }
ol.steps > li p { margin:0 0 6px; }
details.acc[open] ol.steps > li { animation:stepIn .5s ease both; }
details.acc[open] ol.steps > li:nth-child(2){animation-delay:.1s}
details.acc[open] ol.steps > li:nth-child(3){animation-delay:.2s}
details.acc[open] ol.steps > li:nth-child(4){animation-delay:.3s}
details.acc[open] ol.steps > li:nth-child(5){animation-delay:.4s}
details.acc[open] ol.steps > li:nth-child(6){animation-delay:.5s}
details.acc[open] ol.steps > li:nth-child(n+7){animation-delay:.6s}
@keyframes stepIn { from{opacity:0; transform:translateX(-14px);} to{opacity:1; transform:none;} }

/* "micro" intro tag under an H2 */
.micro-intro { color:var(--muted); font-size:16px; margin:-4px 0 14px; }
.subweight { display:inline-block; font-size:12px; font-weight:800; color:var(--teal-d); background:#e7f2f2; padding:2px 10px; border-radius:99px; margin-left:8px; vertical-align:middle; }
[data-theme="dark"] .subweight { background:#123535; color:#6fe0e0; }

/* gentle hover lift on examples */
.example { transition:transform .15s ease, box-shadow .2s ease; }
.example:hover { transform:translateY(-2px); box-shadow:var(--shadow-lg); }

/* respect reduced-motion */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity:1 !important; transform:none !important; transition:none !important; }
  details.acc[open] .acc-body > *, details.acc[open] ol.steps > li { animation:none !important; }
  .scroll-prog { display:none; }
  html { scroll-behavior:auto; }
}