/* ============================================================
   CCA-F: THE MARCUS FILES — Corporate light theme
   Apex Consulting AI CoE · CCA-F Certification Study Guide
   ============================================================ */

:root {
  /* ApexOS — muted retro palette (remapped tokens recolor the whole app) */
  --bg: #414a52;          /* desktop slate */
  --bg2: #e7e2d5;         /* light greige fill */
  --panel: #faf8f2;       /* off-white paper (readable content) */
  --panel2: #f0ece2;
  --line: #c7c0b0;        /* warm border */
  --accent: #5f7a93;      /* muted steel-blue */
  --accent-soft: #6d8299;
  --accent-dim: #e6ebf0;  /* faint steel tint */
  --amber: #9a7b3a;       /* muted amber */
  --orange: #a8603a;      /* muted */
  --lilac: #6f6796;       /* muted lilac */
  --good: #5b7d54;        /* muted sage */
  --bad: #a8503e;         /* muted brick */
  --text: #2c2b26;        /* ink */
  --text-dim: #6b6a60;    /* muted */
  --mono: "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
  --disp: "Inter", "Avenir Next", "Segoe UI", sans-serif;
  --body: "Inter", "Avenir Next", "Segoe UI", sans-serif;
  /* ApexOS chrome */
  --os-face: #ddd8cb;
  --os-lt: #f1eee5;
  --os-dk: #b2ad9e;
  --os-dk2: #827e70;
  --os-title: #6d8299;
  --os-title-lt: #9fb1c1;
  --os-title-dk: #4a5a6b;
  --os-title-text: #f4f1e8;
  --os-desk: #414a52;
  --crt: "VT323", "JetBrains Mono", monospace;
  --crt-green: #54e08a;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--body);
  font-size: 16.5px;
  line-height: 1.65;
  letter-spacing: .01em;
}

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

/* ---------- layout ---------- */
#app { display: flex; min-height: 100vh; }

#sidebar {
  width: 280px; flex: 0 0 280px;
  background: var(--panel);
  border-right: 1px solid var(--line);
  padding: 20px 14px 40px;
  position: sticky; top: 0; height: 100vh; overflow-y: auto;
}

.brand { padding: 4px 8px 14px; border-bottom: 1px solid var(--line); margin-bottom: 14px; }
.brand .t1 {
  font-family: var(--disp); font-weight: 800; font-size: 16px;
  color: var(--text); letter-spacing: .01em;
}
.brand .t1 span { color: var(--accent); }
.brand .t2 { font-size: 11px; color: var(--text-dim); letter-spacing: .10em; text-transform: uppercase; margin-top: 3px; }

.progress-wrap { margin: 10px 8px 18px; }
.progress-label { display: flex; justify-content: space-between; font-size: 11.5px; color: var(--text-dim); letter-spacing: .08em; text-transform: uppercase; margin-bottom: 5px; }
.progress-bar { height: 5px; background: var(--bg2); border: 1px solid var(--line); border-radius: 4px; overflow: hidden; }
.progress-bar > div { height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-soft)); transition: width .4s; }

nav .nav-group { font-size: 10.5px; letter-spacing: .18em; color: var(--text-dim); text-transform: uppercase; margin: 16px 8px 5px; }

nav a.nav-item {
  display: flex; align-items: center; gap: 9px;
  padding: 7px 10px 7px 8px; margin: 2px 0;
  border-radius: 6px;
  color: var(--text); font-weight: 500; font-size: 14px;
  border-left: 3px solid transparent;
}
nav a.nav-item:hover { background: var(--bg2); text-decoration: none; }
nav a.nav-item.active { background: var(--accent-dim); border-left-color: var(--accent); color: var(--accent); font-weight: 600; }
nav a.nav-item .ep-pip {
  flex: 0 0 40px; text-align: center; font-family: var(--mono); font-size: 10px;
  padding: 2px 0; border-radius: 5px; letter-spacing: .04em;
  background: var(--bg2); color: var(--text-dim); border: 1px solid var(--line);
}
nav a.nav-item:nth-of-type(4n+1) .ep-pip { background: #dbeafe; color: #1d4ed8; border-color: #bfdbfe; }
nav a.nav-item:nth-of-type(4n+2) .ep-pip { background: #fce7f3; color: #9d174d; border-color: #fbcfe8; }
nav a.nav-item:nth-of-type(4n+3) .ep-pip { background: #dcfce7; color: #166534; border-color: #bbf7d0; }
nav a.nav-item:nth-of-type(4n+4) .ep-pip { background: #fef9c3; color: #854d0e; border-color: #fef08a; }
nav a.nav-item .done-mark { margin-left: auto; color: var(--good); font-size: 12px; }

#main { flex: 1; min-width: 0; padding: 32px 44px 100px; }
.page { max-width: 820px; margin: 0 auto; }

/* ---------- episode header ---------- */
.ep-head {
  border: 1px solid var(--line); border-top: 3px solid var(--accent);
  border-radius: 8px;
  background: var(--panel);
  padding: 22px 28px; margin-bottom: 26px;
  box-shadow: 0 1px 4px rgba(0,0,0,.05);
}
.ep-kicker { font-family: var(--mono); font-size: 11px; letter-spacing: .18em; color: var(--accent); text-transform: uppercase; margin-bottom: 6px; }
.ep-head h1 {
  font-family: var(--disp); font-size: 27px; font-weight: 800; letter-spacing: -.02em;
  margin: 4px 0 6px; color: var(--text);
}
.ep-sub { color: var(--text-dim); font-size: 15.5px; }
.ep-meta { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 14px; }
.tag {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .06em;
  padding: 3px 10px; border-radius: 20px; border: 1px solid var(--line);
  background: var(--bg2); color: var(--text-dim);
}
.tag.dom { background: var(--accent-dim); color: var(--accent); border-color: #bfdbfe; }
.tag.scn { background: #fce7f3; color: #9d174d; border-color: #fbcfe8; }

/* ---------- jump nav ---------- */
.ep-jumpnav {
  display: flex; gap: 6px; flex-wrap: wrap;
  margin: -10px 0 24px; padding: 10px 0;
  border-bottom: 1px solid var(--line);
}
.jn-link {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .10em; text-transform: uppercase;
  padding: 4px 14px; border-radius: 20px;
  border: 1px solid var(--line); color: var(--text-dim);
  cursor: pointer; transition: all .15s; background: var(--panel);
}
.jn-link:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }

/* ---------- typography ---------- */
h2 {
  font-family: var(--disp); font-size: 20px; font-weight: 700; letter-spacing: -.01em;
  color: var(--text); margin: 42px 0 14px; padding-bottom: 10px;
  border-bottom: 2px solid var(--line);
}
h3 { font-family: var(--disp); font-size: 16px; font-weight: 600; color: var(--text); margin: 26px 0 10px; }
p { margin: 12px 0; }
strong { color: var(--text); font-weight: 600; }
em { color: var(--text-dim); }
hr { border: none; border-top: 1px solid var(--line); margin: 30px 0; }

ul, ol { padding-left: 24px; }
li { margin: 6px 0; }

table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 15px; }
.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; margin: 16px 0; }
.table-scroll table { margin: 0; }
/* On phones, keep columns readable and let the wrapper scroll sideways */
@media (max-width: 700px) { .table-scroll table { min-width: 560px; } }
th { font-family: var(--disp); font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--text-dim); text-align: left; }
th, td { border: 1px solid var(--line); padding: 9px 13px; vertical-align: top; }
tr:nth-child(even) td { background: var(--bg2); }
thead tr { background: var(--bg2); }

code { font-family: var(--mono); font-size: .84em; background: var(--bg2); border: 1px solid var(--line); border-radius: 4px; padding: 1px 5px; color: var(--accent); }

/* ---------- story prose (The Office–style narrative) ---------- */
.story {
  border-left: 4px solid var(--lilac);
  padding: 20px 26px;
  margin: 28px 0;
  background: #f2efe6;
  border-radius: 0;
  font-size: 16.5px;
}
.story .scene {
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .18em;
  color: var(--lilac); text-transform: uppercase;
  margin: 0 0 14px; padding-bottom: 10px;
  border-bottom: 1px solid rgba(124,58,237,.18);
  font-style: normal;
}

/* Talking head (Office-style confessional aside) */
.talking-head {
  border: 1px solid var(--line); border-left: 4px solid #94a3b8;
  background: var(--panel); border-radius: 0 6px 6px 0;
  padding: 14px 20px; margin: 18px 0;
  font-style: italic; font-size: 15.5px; color: var(--text);
}
.talking-head::before {
  content: attr(data-person);
  display: block; font-style: normal; font-weight: 700;
  font-size: 10.5px; color: var(--text-dim); letter-spacing: .08em;
  text-transform: uppercase; margin-bottom: 8px;
}

/* Case notes (post-engagement summary) */
.log {
  font-family: var(--mono); font-size: 13.5px; color: var(--text);
  border: 1px solid #bfdbfe; border-left: 4px solid var(--accent);
  border-radius: 0 6px 6px 0; padding: 14px 18px; margin: 24px 0;
  background: var(--accent-dim); line-height: 1.6;
}
.log b { color: var(--accent); font-weight: 700; }

/* ---------- callouts ---------- */
.co { border: 1px solid var(--line); border-left-width: 4px; border-radius: 0 6px 6px 0; padding: 12px 18px; margin: 16px 0; font-size: 15.5px; }
.co .co-t { font-family: var(--disp); font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; margin-bottom: 5px; display: block; }
.co.def   { border-left-color: var(--accent);  background: #eff6ff; border-color: #bfdbfe; } .co.def .co-t   { color: var(--accent); }
.co.why   { border-left-color: var(--good);    background: #f0fdf4; border-color: #bbf7d0; } .co.why .co-t   { color: var(--good); }
.co.tip   { border-left-color: var(--lilac);   background: #faf5ff; border-color: #ddd6fe; } .co.tip .co-t   { color: var(--lilac); }
.co.trap  { border-left-color: var(--orange);  background: #fff7ed; border-color: #fed7aa; } .co.trap .co-t  { color: var(--orange); }
.co.lens  { border-left-color: var(--amber);   background: #fefce8; border-color: #fde68a; } .co.lens .co-t  { color: var(--amber); }
.co.check { border-left-color: var(--good);    background: #f0fdf4; border-color: #bbf7d0; } .co.check .co-t { color: var(--good); }

.decision {
  display: grid; grid-template-columns: 88px 1fr; gap: 4px 12px;
  border: 1px solid var(--line); border-radius: 6px; padding: 12px 16px; margin: 16px 0;
  background: var(--panel); font-size: 15px;
}
.decision dt { font-family: var(--disp); font-size: 10.5px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--amber); align-self: start; padding-top: 2px; }
.decision dd { margin: 0; }

/* ---------- viewscreen (docs/Skilljar lookup panels) ---------- */
.viewscreen {
  border: 1px solid var(--line); border-top: 3px solid var(--accent);
  border-radius: 8px;
  background: var(--panel);
  margin: 20px 0; overflow: hidden;
  box-shadow: 0 1px 4px rgba(0,0,0,.05);
}
.vs-head {
  display: flex; align-items: center; gap: 8px;
  font-family: var(--mono); font-size: 11px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--accent); background: var(--accent-dim);
  border-bottom: 1px solid #bfdbfe; padding: 8px 16px;
}
.vs-head::before { content: "▮ "; color: var(--accent); font-size: 9px; }
.vs-body { padding: 14px 20px 16px; font-size: 15.5px; }
.vs-body .vs-src { font-family: var(--mono); font-size: 12px; color: var(--text-dim); margin-bottom: 10px; }
.viewscreen.skilljar { border-top-color: var(--amber); }
.viewscreen.skilljar .vs-head { color: var(--amber); background: #fefce8; border-bottom-color: #fde68a; }
.viewscreen.skilljar .vs-head::before { color: var(--amber); }

/* ---------- terminal sim (stays dark for readability) ---------- */
.term {
  border: 1px solid #334155; border-radius: 8px; overflow: hidden; margin: 18px 0;
  background: #0f172a; box-shadow: 0 2px 8px rgba(0,0,0,.12);
}
.term-bar {
  display: flex; align-items: center; gap: 8px;
  background: #1e293b; padding: 7px 14px; border-bottom: 1px solid #334155;
  font-family: var(--mono); font-size: 11.5px; color: #64748b; letter-spacing: .06em;
}
.term-bar .dots { display: flex; gap: 6px; }
.term-bar .dots i { width: 10px; height: 10px; border-radius: 50%; }
.term-bar .dots i:nth-child(1){ background:#ef4444 }
.term-bar .dots i:nth-child(2){ background:#f59e0b }
.term-bar .dots i:nth-child(3){ background:#22c55e }
.term pre {
  margin: 0; padding: 14px 18px; overflow-x: auto;
  font-family: var(--mono); font-size: 13px; line-height: 1.65; color: #cbd5e1;
}
.term .pr { color: #22d3ee; }
.term .cmd { color: #f1f5f9; }
.term .ok { color: #4ade80; }
.term .err { color: #f87171; }
.term .warn { color: #fbbf24; }
.term .dim { color: #475569; }
.term .claude { color: #c084fc; }

/* ---------- code blocks ---------- */
.codeblock { position: relative; margin: 16px 0; }
.codeblock pre {
  margin: 0; background: #0f172a; border: 1px solid #334155; border-radius: 8px;
  padding: 14px 18px; overflow-x: auto;
  font-family: var(--mono); font-size: 13px; line-height: 1.6; color: #cbd5e1;
}
.codeblock .cb-label {
  position: absolute; top: -9px; left: 14px;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .08em;
  background: var(--panel); border: 1px solid var(--line); border-radius: 6px;
  color: var(--amber); padding: 1px 9px;
}
.copy-btn {
  position: absolute; top: 8px; right: 8px;
  font-family: var(--mono); font-size: 10.5px; letter-spacing: .06em;
  background: rgba(255,255,255,.08); color: #94a3b8;
  border: 1px solid #475569; border-radius: 4px;
  padding: 3px 10px; cursor: pointer;
}
.copy-btn:hover { background: rgba(255,255,255,.18); color: #cbd5e1; }
.copy-btn.copied { color: #4ade80; border-color: #4ade80; }

/* ---------- labs ---------- */
.lab {
  border: 1px solid #bbf7d0; border-left: 4px solid var(--good);
  border-radius: 0 8px 8px 0;
  background: #f0fdf4;
  padding: 6px 26px 20px; margin: 26px 0;
}
.lab-head {
  font-family: var(--disp); font-weight: 700; letter-spacing: .03em; text-transform: uppercase;
  color: var(--good); font-size: 12.5px; margin: 16px 0 4px;
}
.lab-head::before { content: "◗ "; }
.step { display: flex; gap: 12px; align-items: flex-start; padding: 9px 0; border-bottom: 1px dashed #bbf7d0; }
.step:last-child { border-bottom: none; }
.step input[type=checkbox] {
  appearance: none; flex: 0 0 20px; width: 20px; height: 20px; margin-top: 3px;
  border: 2px solid #86efac; border-radius: 4px; background: transparent; cursor: pointer; position: relative;
  transition: background .15s;
}
.step input[type=checkbox]:checked { background: rgba(22,163,74,.12); border-color: var(--good); }
.step input[type=checkbox]:checked::after {
  content: "✓"; position: absolute; inset: 0; display: grid; place-items: center;
  color: var(--good); font-size: 13px; font-weight: 700;
}
.step .step-body { flex: 1; min-width: 0; }
.step .step-t { font-weight: 600; color: var(--text); }
.step input:checked ~ .step-body .step-t { color: var(--good); text-decoration: line-through; opacity: .75; }

/* ---------- dial widget ---------- */
.dial-chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.chip {
  font-family: var(--body); font-weight: 500; font-size: 14.5px;
  border: 1.5px solid var(--line); background: var(--panel); color: var(--text);
  border-radius: 20px; padding: 6px 16px; cursor: pointer; transition: all .2s;
  box-shadow: 0 1px 2px rgba(0,0,0,.06);
}
.chip:hover { border-color: var(--accent); box-shadow: 0 1px 6px rgba(37,99,235,.2); }
.chip.flip-code { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }
.chip.flip-model { border-color: var(--lilac); color: var(--lilac); background: #f5f3ff; }
.chip-why { display: none; font-size: 14px; margin-top: 6px; color: var(--text-dim); font-weight: 400; }
.chip.revealed .chip-why { display: block; }
.chip.revealed { border-radius: 10px; text-align: left; max-width: 100%; }

/* ---------- quiz ---------- */
.quiz { border: 1px solid #fed7aa; border-top: 3px solid var(--amber); border-radius: 8px; background: #fffbeb; padding: 8px 26px 22px; margin: 28px 0; }
.quiz-title { font-family: var(--disp); font-weight: 700; letter-spacing: .03em; text-transform: uppercase; color: var(--amber); font-size: 12.5px; margin: 16px 0 6px; }
.quiz-title::before { content: "⌁ "; }
.qq { margin: 20px 0 10px; padding-top: 14px; border-top: 1px dashed #fcd34d; }
.qq .qnum { font-family: var(--mono); color: var(--amber); font-size: 11.5px; letter-spacing: .12em; }
.qq .qtext { font-weight: 600; color: var(--text); margin: 6px 0 10px; font-size: 16px; }
.qopt { display: block; border: 1.5px solid var(--line); border-radius: 6px; padding: 9px 14px; margin: 7px 0; cursor: pointer; font-size: 15px; transition: all .15s; background: var(--panel); }
.qopt:hover { border-color: var(--accent); background: var(--accent-dim); }
.qopt input { margin-right: 10px; accent-color: var(--accent); }
.qopt.sel { border-color: var(--accent); background: var(--accent-dim); }
.qopt.right { border-color: var(--good); background: #f0fdf4; }
.qopt.wrong { border-color: var(--bad); background: #fef2f2; }
.qopt.right > span::before { content: "✓ "; color: var(--good); font-weight: 700; }
.qopt.wrong > span::before { content: "✗ "; color: var(--bad); font-weight: 700; }
.qopt .opt-why { display: none; font-size: 14px; color: var(--text-dim); margin-top: 6px; padding-top: 6px; border-top: 1px dashed var(--line); }
.qopt.show-why .opt-why { display: block; }
.opt-trap { display: inline-block; font-family: var(--mono); font-size: 10.5px; letter-spacing: .06em; color: var(--orange); border: 1px solid #fed7aa; border-radius: 9px; padding: 1px 8px; margin-bottom: 4px; background: #fff7ed; }
.quiz-actions { margin-top: 18px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
.btn {
  font-family: var(--disp); font-size: 12.5px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase;
  background: var(--panel); color: var(--accent); border: 1.5px solid var(--accent);
  border-radius: 6px; padding: 8px 20px; cursor: pointer; transition: all .15s;
}
.btn:hover { background: var(--accent); color: #fff; }
.btn.warn { color: var(--orange); border-color: var(--orange); background: var(--panel); }
.btn.warn:hover { background: var(--orange); color: #fff; }
.quiz-score { font-family: var(--disp); font-size: 15px; font-weight: 700; color: var(--good); }
.quiz-score.fail { color: var(--orange); }
.best-badge { font-family: var(--mono); font-size: 12px; color: var(--text-dim); }

/* exam extras */
.exam-hud { position: sticky; top: 0; z-index: 5; display: flex; gap: 18px; align-items: center; background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 9px 18px; margin: 14px 0; font-family: var(--mono); font-size: 13px; box-shadow: 0 1px 4px rgba(0,0,0,.08); }
.exam-hud .timer { color: var(--accent); font-size: 16px; letter-spacing: .1em; font-weight: 700; }
.exam-hud .timer.low { color: var(--bad); animation: pulse 1s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.5} }
.trap-report { border: 1px solid #fed7aa; border-top: 3px solid var(--amber); border-radius: 8px; padding: 16px 22px; margin: 20px 0; background: #fffbeb; }
.trap-report h3 { color: var(--amber); margin-top: 4px; font-size: 15px; }
.trap-bar { display: flex; align-items: center; gap: 10px; margin: 6px 0; font-size: 14.5px; }
.trap-bar .tb { height: 8px; background: var(--amber); border-radius: 3px; }

/* ---------- quiz stepper (one question at a time) ---------- */
.qdots { display: flex; flex-wrap: wrap; gap: 7px; margin: 14px 0 4px; }
.qdot { width: 13px; height: 13px; border-radius: 50%; border: 1.5px solid var(--line); background: var(--panel); padding: 0; cursor: pointer; transition: all .15s; }
.qdot:hover { border-color: var(--accent); }
.qdot.answered { background: var(--accent-dim); border-color: var(--accent); }
.qdot.active { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-dim); }
.qdot.correct { background: var(--good); border-color: var(--good); }
.qdot.wrong { background: var(--bad); border-color: var(--bad); }
.quiz-stage { min-height: 210px; }
.quiz-stage .qq { border-top: none; padding-top: 4px; margin: 10px 0 4px; }
.quiz-nav { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: 16px; flex-wrap: wrap; }
.quiz-nav .q-counter { font-family: var(--mono); font-size: 12px; color: var(--text-dim); letter-spacing: .08em; }
.quiz-nav .btn:disabled { opacity: .4; cursor: not-allowed; }
.quiz-nav .btn:disabled:hover { background: var(--panel); color: var(--accent); }

/* ---------- collapsible lab ---------- */
details.lab-collapse { margin: 26px 0; }
details.lab-collapse > summary {
  list-style: none; cursor: pointer; display: flex; align-items: center; gap: 12px;
  font-family: var(--disp); font-weight: 700; letter-spacing: .03em; text-transform: uppercase;
  color: var(--good); font-size: 12.5px;
  background: #f0fdf4; border: 1px solid #bbf7d0; border-left: 4px solid var(--good);
  border-radius: 0 8px 8px 0; padding: 14px 20px; transition: background .15s;
}
details.lab-collapse > summary::-webkit-details-marker { display: none; }
details.lab-collapse > summary::before { content: "◗"; color: var(--good); }
details.lab-collapse > summary:hover { background: #dcfce7; }
details.lab-collapse > summary .ls-meta { font-family: var(--mono); font-weight: 400; text-transform: none; letter-spacing: 0; color: var(--text-dim); font-size: 11.5px; }
details.lab-collapse > summary .ls-caret { margin-left: auto; transition: transform .2s; font-size: 11px; }
details.lab-collapse[open] > summary .ls-caret { transform: rotate(180deg); }
details.lab-collapse[open] > summary { border-bottom-left-radius: 0; border-bottom-right-radius: 0; }
details.lab-collapse > .lab { margin: 0; border-top: none; border-radius: 0 0 8px 0; }

/* ---------- objectives / exam-payoff band ---------- */
.ep-objectives { border: 1px solid var(--line); border-left: 4px solid var(--accent); background: var(--accent-dim); border-radius: 0 8px 8px 0; padding: 12px 18px; margin: 0 0 22px; }
.ep-objectives .eo-h { font-family: var(--mono); font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); margin-bottom: 6px; }
.ep-objectives ul { margin: 0; padding-left: 1.2em; }
.ep-objectives li { margin: 3px 0; font-size: 14.5px; }

/* ---------- sidebar mastery markers + footer ---------- */
.done-mark.partial { color: var(--amber); }
.nav-foot { margin: 14px 10px 0; padding-top: 12px; border-top: 1px solid var(--line); }
.reset-btn { font-family: var(--mono); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--text-dim); background: transparent; border: 1px solid var(--line); border-radius: 6px; padding: 5px 12px; cursor: pointer; transition: all .15s; }
.reset-btn:hover { border-color: var(--bad); color: var(--bad); }
.nav-note { display: block; margin-top: 8px; font-size: 10.5px; line-height: 1.5; color: var(--text-dim); }

/* ---------- quiz hint + grouped trap report ---------- */
.q-hint { font-size: 12.5px; color: var(--text-dim); margin: 8px 0 0; }
.trap-group { margin: 10px 0 14px; }
.trap-report .trap-bar { cursor: pointer; }
.trap-bar .tb-jump { font-family: var(--mono); font-size: 10.5px; color: var(--accent); margin-left: 6px; opacity: 0; transition: opacity .15s; }
.trap-bar:hover .tb-jump, .trap-bar:focus .tb-jump { opacity: 1; }
.trap-specifics { font-size: 12.5px; color: var(--text-dim); margin: 2px 0 0; }
.trap-remedy { font-size: 13px; color: var(--text); margin: 4px 0 0; }
.exam-hud .dim.warn { color: var(--bad) !important; font-weight: 600; }

/* ---------- per-domain mastery bars (home) ---------- */
#domain-bars { margin: 6px 0 8px; }
.dm-empty { color: var(--text-dim); font-style: italic; }
.dm-row { display: flex; align-items: center; gap: 12px; margin: 7px 0; font-size: 13.5px; }
.dm-name { flex: 0 0 250px; }
.dm-track { flex: 1; height: 9px; background: var(--bg2); border-radius: 5px; overflow: hidden; }
.dm-fill { display: block; height: 100%; border-radius: 5px; background: var(--accent); }
.dm-fill.good { background: var(--good); }
.dm-fill.mid { background: var(--amber); }
.dm-fill.low { background: var(--bad); }
.dm-fill.none { background: var(--line); }
.dm-pct { flex: 0 0 42px; text-align: right; font-family: var(--mono); font-size: 12px; color: var(--text-dim); }
@media (max-width: 700px) { .dm-name { flex-basis: 140px; } }

/* ---------- svg figures ---------- */
.fig { margin: 22px 0; text-align: center; }
.fig svg { max-width: 100%; height: auto; }
.fig .fig-cap { font-family: var(--mono); font-size: 11.5px; color: var(--text-dim); letter-spacing: .08em; margin-top: 8px; text-transform: uppercase; }

/* ---------- misc ---------- */
.next-link { display: inline-block; margin-top: 32px; font-family: var(--disp); font-weight: 600; letter-spacing: .02em; font-size: 14px; border: 1.5px solid var(--accent); border-radius: 6px; padding: 10px 22px; color: var(--accent); }
.next-link:hover { background: var(--accent); color: #fff; text-decoration: none; }
.kbd { font-family: var(--mono); font-size: .82em; border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 4px; padding: 1px 6px; background: var(--bg2); color: var(--text); }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 1100px) { .two-col { grid-template-columns: 1fr; } }

#menu-toggle { display: none; }
@media (max-width: 900px) {
  #app { flex-direction: column; }
  #sidebar { position: relative; width: 100%; height: auto; flex: none; }
  #main { padding: 20px 18px 80px; }
  .decision { grid-template-columns: 1fr; }
}

*:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
::selection { background: var(--accent-dim); color: var(--accent); }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}

/* ============================================================
   ApexOS — retro chrome layer (over readable content)
   ============================================================ */
body { background-color: var(--os-desk); background-image: radial-gradient(rgba(205,214,222,.10) 1px, transparent 1px); background-size: 15px 15px; padding-bottom: 38px; }
.os-out { border: 2px solid; border-color: var(--os-lt) var(--os-dk2) var(--os-dk2) var(--os-lt); }
.os-in { border: 2px solid; border-color: var(--os-dk2) var(--os-lt) var(--os-lt) var(--os-dk2); }

/* sidebar = program manager */
#sidebar { background: var(--os-face); border-right: 2px solid var(--os-dk2); }
.brand { border-bottom: 1px solid var(--os-dk); }
nav a.nav-item { border-radius: 0; }
nav a.nav-item.active { background: var(--os-title); border-left-color: var(--os-title-dk); color: #fff; }
nav a.nav-item.active .ep-pip { filter: none; }
.progress-bar > div { background: var(--os-title); }
.reset-btn { border-radius: 0; }

/* main = desktop surface */
#main { background: transparent; padding: 22px 30px 86px; }
.page { max-width: none; }

/* window chrome */
.os-window { max-width: 880px; margin: 0 auto 16px; background: var(--os-face); border: 2px solid; border-color: var(--os-lt) var(--os-dk2) var(--os-dk2) var(--os-lt); }
.os-titlebar { display: flex; justify-content: space-between; align-items: center; gap: 10px; background: var(--os-title); color: var(--os-title-text); border-top: 2px solid var(--os-title-lt); padding: 5px 5px 5px 11px; font-weight: 700; font-size: 13px; }
.os-titlebar .os-tt { display: flex; align-items: center; gap: 8px; min-width: 0; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
.os-titlebar .wb { display: inline-flex; gap: 3px; flex: 0 0 auto; }
.os-titlebar .wb b { display: inline-flex; align-items: center; justify-content: center; width: 18px; height: 16px; font-size: 10px; color: var(--text); border: 1px solid var(--os-title-dk); background: var(--os-face); }
.os-menubar { display: flex; gap: 16px; padding: 4px 12px; font-size: 13px; background: var(--os-face); border-bottom: 1px solid var(--os-dk); }
.os-menubar button { background: none; border: none; font: inherit; color: var(--text); cursor: pointer; padding: 1px 4px; }
.os-menubar button u { text-decoration: underline; }
.os-menubar button:hover { background: var(--os-title); color: #fff; }
.os-window-body { background: var(--panel); padding: 22px 26px 30px; }

/* flatten the in-window episode header */
.ep-head { box-shadow: none; border: 1px solid var(--os-dk); border-top: 2px solid var(--os-title); border-radius: 0; background: var(--panel2); }

/* retro buttons + quiz options */
.btn { border-radius: 0; border-width: 2px; background: var(--os-face); color: var(--text); border-color: var(--os-lt) var(--os-dk2) var(--os-dk2) var(--os-lt); }
.btn:hover { background: var(--os-title); color: #fff; }
.btn.warn { background: var(--os-face); color: var(--bad); }
.btn.warn:hover { background: var(--bad); color: #fff; }
.btn:active { border-color: var(--os-dk2) var(--os-lt) var(--os-lt) var(--os-dk2); }
.qopt { border-radius: 0; }
.next-link { border-radius: 0; border-width: 2px; border-color: var(--os-lt) var(--os-dk2) var(--os-dk2) var(--os-lt); }
.os-pagenav { display: flex; justify-content: space-between; align-items: center; gap: 14px; margin-top: 32px; flex-wrap: wrap; }
.os-pagenav .next-link { margin-top: 0; }
@media (max-width: 620px) { .os-pagenav { flex-direction: column; align-items: stretch; } .os-pagenav .next-link { text-align: center; } }

/* taskbar */
#os-taskbar { position: fixed; left: 0; right: 0; bottom: 0; height: 36px; z-index: 60; display: flex; align-items: center; gap: 7px; padding: 3px 6px; background: var(--os-face); border-top: 2px solid var(--os-lt); }
#os-taskbar .os-launch { font-weight: 700; display: inline-flex; align-items: center; gap: 7px; padding: 4px 13px; cursor: pointer; color: var(--os-title); font-size: 13px; background: var(--os-face); }
#os-taskbar .os-winbtn { padding: 4px 13px; font-size: 12.5px; max-width: 240px; overflow: hidden; white-space: nowrap; text-overflow: ellipsis; color: var(--text); background: var(--os-face); }
#os-taskbar .os-prog { margin-left: auto; font-family: var(--crt); font-size: 15px; color: var(--text-dim); padding: 0 6px; }
#os-taskbar .os-clock { font-family: var(--crt); font-size: 16px; padding: 4px 12px; color: var(--text); }

/* boot splash (green CRT) */
#os-boot { position: fixed; inset: 0; z-index: 200; background: #04130b; color: var(--crt-green); font-family: var(--crt); font-size: 19px; line-height: 1.3; padding: 8vh 8vw; text-shadow: 0 0 4px rgba(84,224,138,.4); }
#os-boot.hide, html.booted #os-boot { display: none; }
#os-boot .bootbar { display: inline-block; border: 1px solid var(--crt-green); width: 240px; height: 14px; padding: 1px; vertical-align: -1px; }
#os-boot .bootbar i { display: block; height: 100%; width: 6%; background: var(--crt-green); animation: bootfill 1.3s ease-out forwards; }
#os-boot .bootcur { display: inline-block; width: 10px; height: 15px; background: var(--crt-green); vertical-align: -2px; animation: blink 1s steps(1) infinite; }
#os-boot .bootskip { position: absolute; right: 8vw; bottom: 7vh; font-family: var(--crt); font-size: 16px; color: var(--crt-green); background: none; border: 1px solid var(--crt-green); padding: 3px 16px; cursor: pointer; }
@keyframes bootfill { to { width: 100%; } }
@keyframes blink { 50% { opacity: 0; } }

/* between-episode loader */
#os-loader { position: fixed; inset: 0; z-index: 120; background: #04130b; color: var(--crt-green); font-family: var(--crt); font-size: 20px; display: flex; align-items: center; justify-content: center; flex-direction: column; gap: 16px; text-shadow: 0 0 4px rgba(84,224,138,.4); }
#os-loader.hide { display: none; }
#os-loader .ldbar { border: 1px solid var(--crt-green); width: 260px; height: 16px; padding: 2px; }
#os-loader .ldbar i { display: block; height: 100%; width: 8%; background: var(--crt-green); animation: bootfill .5s linear forwards; }

/* quiz error / success dialog */
.os-dialog-layer { position: fixed; inset: 0; z-index: 150; background: rgba(30,34,40,.45); display: flex; align-items: center; justify-content: center; }
.os-dialog-layer.hide { display: none; }
.os-dialog { width: 360px; max-width: 90vw; background: var(--os-face); border: 2px solid; border-color: var(--os-lt) var(--os-dk2) var(--os-dk2) var(--os-lt); }
.os-dialog .od-title { display: flex; justify-content: space-between; align-items: center; background: var(--bad); color: #fff; padding: 5px 6px 5px 10px; font-weight: 700; font-size: 13px; border-top: 2px solid #cf8576; }
.os-dialog .od-title.ok { background: var(--good); border-top-color: #9bbd94; }
.os-dialog .od-body { display: flex; gap: 14px; align-items: flex-start; padding: 18px 16px; }
.os-haz { flex: 0 0 32px; height: 32px; background: var(--bad); transform: rotate(45deg); display: flex; align-items: center; justify-content: center; border: 2px solid; border-color: #cf8576 #5e2519 #5e2519 #cf8576; }
.os-haz span { transform: rotate(-45deg); color: #fff; font-weight: 700; font-size: 19px; }
.os-haz.ok { background: var(--good); transform: none; border-radius: 50%; border-color: #9bbd94 #2f4429 #2f4429 #9bbd94; }
.os-haz.ok span { transform: none; }
.os-dialog .od-msg { font-size: 14px; line-height: 1.5; color: var(--text); }
.os-dialog .od-msg .od-rem { display: block; margin-top: 7px; font-size: 13px; color: var(--text-dim); }
.os-dialog .od-actions { display: flex; justify-content: center; padding: 0 0 16px; }
.os-shake { animation: osshake .28s; }
@keyframes osshake { 0%,100%{transform:translateX(0)} 25%{transform:translateX(-5px)} 75%{transform:translateX(5px)} }

/* optional scanlines (off by default; opt-in) */
body.os-scan::after { content: ""; position: fixed; inset: 0; pointer-events: none; z-index: 110; background: repeating-linear-gradient(0deg, rgba(0,0,0,.16), rgba(0,0,0,.16) 1px, transparent 1px, transparent 3px); }

@media (max-width: 900px) {
  #os-taskbar .os-winbtn { display: none; }
  .os-window { margin-bottom: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  #os-boot .bootbar i, #os-loader .ldbar i { animation: none !important; width: 100%; }
  #os-boot .bootcur { animation: none !important; }
  .os-shake { animation: none !important; }
  body.os-scan::after { display: none; }
}