/* CCA-F Interactive Guide — base design system (DIV-23)
   Identity: subtle ambient particle system (plan R16).
   Particles render on #ambient behind .wrap; text always sits on calm dark space. */

:root {
  --bg-deep: #05070d;
  --bg-mid: #070b14;
  --bg-glow: #0d1526;
  --ink: #dce8f5;
  --ink-strong: #eef6ff;
  --ink-muted: #8fb0cc;
  --ink-faint: #557a9e;
  --line: rgba(80, 140, 200, 0.14);
  --line-hover: rgba(120, 190, 255, 0.45);
  --card: rgba(13, 21, 38, 0.55);
  --accent: #4aa3e8;
  --accent-soft: rgba(90, 180, 255, 0.55);
  --gold: #f0b34a;
  --gold-soft: rgba(255, 190, 90, 0.55);
  --radius: 16px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
html, body { min-height: 100%; }

body {
  background: radial-gradient(ellipse at 50% -20%, var(--bg-glow) 0%, var(--bg-mid) 55%, var(--bg-deep) 100%);
  background-attachment: fixed;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  line-height: 1.55;
  overflow-x: hidden;
}

#ambient { position: fixed; inset: 0; z-index: 0; pointer-events: none; }

.wrap { position: relative; z-index: 1; max-width: 880px; margin: 0 auto; padding: 64px 24px 60px; }

/* ---------- hero ---------- */
.mark {
  display: block; margin: 0 auto 22px; width: 72px; height: 72px;
  border-radius: 16px;
  box-shadow: 0 0 28px rgba(90, 180, 255, 0.18), 0 0 60px rgba(255, 190, 90, 0.10);
}
.kicker { text-align: center; letter-spacing: 0.35em; text-transform: uppercase; font-size: 11px; color: #4d7ba6; }
.hero h1 { text-align: center; font-size: clamp(28px, 5vw, 44px); font-weight: 650; margin: 14px 0 10px; color: var(--ink-strong); }
.hero .sub { text-align: center; color: var(--ink-muted); font-size: 16px; max-width: 560px; margin: 0 auto; }
.hero .sub strong { color: #cfe6ff; font-weight: 600; }
.hero-cta { text-align: center; margin: 26px 0 0; }
.hero.compact { display: none; } /* hero hides on step pages */

/* hero story (DIV-25) */
.story {
  max-width: 620px; margin: 34px auto 0; padding: 26px 28px;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  backdrop-filter: blur(4px);
}
.story p { color: var(--ink); font-size: 15px; line-height: 1.65; }
.story p + p { margin-top: 14px; }
.story strong { color: #ffd98f; font-weight: 600; }
.story em { color: #cfe6ff; }
.story-sign { color: var(--ink-faint) !important; font-size: 13px !important; text-align: right; margin-top: 16px !important; }

/* blocker waypoints inside steps (DIV-25) */
.waypoint {
  margin: 26px 0 8px; padding: 20px 22px;
  border-left: 3px solid var(--gold); border-radius: 0 12px 12px 0;
  background: rgba(90, 65, 20, 0.14);
}
.wp-kicker { font-size: 11px; letter-spacing: 0.25em; text-transform: uppercase; color: #c9a35a; }
.waypoint h3 { font-size: 15.5px; color: #ffe9b8; font-weight: 600; margin-top: 6px; }
.waypoint p:not(.wp-kicker) { margin-top: 8px; color: #d9c08a; font-size: 14px; line-height: 1.6; }
.waypoint strong { color: #ffd98f; }
.waypoint em { color: #ffe9b8; font-style: italic; }

.btn {
  display: inline-block; padding: 11px 22px; border-radius: 999px;
  color: #06121f; text-decoration: none; font-weight: 600; font-size: 14.5px;
  background: linear-gradient(135deg, #9fd3ff, var(--accent));
  box-shadow: 0 0 18px rgba(90, 180, 255, 0.35);
  transition: transform 0.25s, box-shadow 0.25s;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 0 26px rgba(90, 180, 255, 0.5); }
.btn.ghost {
  background: none; color: #9fd7ff; border: 1px solid #1e3a5a; box-shadow: none;
}
.btn.ghost:hover { border-color: var(--line-hover); }

/* ---------- journey map ---------- */
.map { position: relative; display: flex; flex-direction: column; gap: 26px; margin-top: 64px; }

.step {
  position: relative; display: flex; gap: 18px; align-items: center;
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px 24px;
  backdrop-filter: blur(4px);
  color: inherit; text-decoration: none;
  transition: border-color 0.3s, transform 0.3s;
}
.step:hover, .step:focus-visible { border-color: var(--line-hover); transform: translateY(-2px); outline: none; }
.step:focus-visible { box-shadow: 0 0 0 2px rgba(120, 190, 255, 0.5); }

.node {
  width: 44px; height: 44px; border-radius: 50%; flex: 0 0 44px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 15px; color: #06121f;
  background: radial-gradient(circle at 35% 30%, #b8e2ff, var(--accent) 60%, #1d5a94);
  box-shadow: 0 0 18px var(--accent-soft), 0 0 46px rgba(90, 180, 255, 0.18);
}
.step.done .node {
  background: radial-gradient(circle at 35% 30%, #ffe9b8, var(--gold) 60%, #a06614);
  box-shadow: 0 0 18px var(--gold-soft), 0 0 46px rgba(255, 190, 90, 0.18);
}

.step h3 { font-size: 17px; color: #e8f3ff; font-weight: 600; }
.step p { color: #7f9cba; font-size: 13.5px; margin-top: 3px; line-height: 1.45; }
.prog { margin-left: auto; font-size: 12px; color: var(--ink-faint); white-space: nowrap; padding-left: 12px; }
.step.done .prog { color: #c9a35a; }

/* ---------- step page ---------- */
.step-page { margin-top: 40px; }
.crumb { font-size: 13px; margin-bottom: 26px; }
.crumb a { color: #9fd7ff; text-decoration: none; }
.crumb a:hover { text-decoration: underline; }
.step-head { display: flex; align-items: center; gap: 16px; margin-bottom: 8px; }
.step-head .node { width: 38px; height: 38px; flex-basis: 38px; font-size: 13.5px; }
.step-head h2 { font-size: clamp(22px, 4vw, 30px); color: var(--ink-strong); font-weight: 650; }
.step-page .lede { color: var(--ink-muted); font-size: 15.5px; max-width: 640px; }

.placeholder {
  margin-top: 30px; border: 1px dashed rgba(80, 140, 200, 0.25);
  border-radius: var(--radius); padding: 34px 28px; text-align: center;
  color: var(--ink-faint); font-size: 14px; background: rgba(13, 21, 38, 0.35);
}
.placeholder b { color: var(--ink-muted); font-weight: 600; }

.step-nav { display: flex; justify-content: space-between; gap: 12px; margin-top: 34px; }

/* ---------- quick-bit cards (DIV-24) ---------- */
.step-prog { margin-left: auto; font-size: 12.5px; color: var(--ink-faint); white-space: nowrap; }

.cards { display: flex; flex-direction: column; gap: 22px; margin-top: 30px; }

.domain { margin-top: 44px; }
.domain:first-of-type { margin-top: 30px; }
.domain-head { display: flex; align-items: baseline; justify-content: space-between; gap: 14px; border-bottom: 1px solid rgba(80, 140, 200, 0.14); padding-bottom: 8px; }
.domain-head h3 { font-size: 15px; font-weight: 600; color: #a8cbe8; letter-spacing: 0.02em; }
.domain-meta { font-size: 12px; color: var(--ink-faint); white-space: nowrap; }
.domain .cards { margin-top: 18px; }

.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 22px 24px;
  backdrop-filter: blur(4px);
  transition: border-color 0.3s;
}
.card:hover { border-color: var(--line-hover); }
.card.read { border-color: rgba(255, 190, 90, 0.28); }

.card-head { display: flex; align-items: baseline; justify-content: space-between; gap: 14px; }
.card-head h3 { font-size: 16.5px; color: var(--ink-strong); font-weight: 600; display: inline; }
.card-head .mins { font-size: 12px; color: var(--ink-faint); margin-left: 10px; }

.mark {
  flex: 0 0 auto; cursor: pointer; font-size: 12.5px; font-weight: 600;
  color: #9fd7ff; background: none; border: 1px solid #1e3a5a; border-radius: 999px;
  padding: 6px 14px; transition: border-color 0.25s, color 0.25s, box-shadow 0.25s;
}
.mark:hover { border-color: var(--line-hover); }
.mark[aria-pressed="true"] {
  color: #ffd98f; border-color: rgba(255, 190, 90, 0.45);
  box-shadow: 0 0 12px rgba(255, 190, 90, 0.18);
}

.card .quick { margin-top: 12px; color: var(--ink); font-size: 14.5px; }
.card .quick p + p { margin-top: 10px; }
.card .quick strong { color: #cfe6ff; }

.card ul { margin: 10px 0 0 20px; }
.card li + li { margin-top: 7px; }
.card a { color: #9fd7ff; text-decoration: none; border-bottom: 1px solid rgba(120, 190, 255, 0.3); transition: border-color 0.25s; }
.card a:hover { border-color: var(--line-hover); }

.lane { margin-top: 12px; border-top: 1px solid rgba(80, 140, 200, 0.10); padding-top: 10px; }
.lane summary {
  cursor: pointer; list-style: none; font-size: 13px; color: #6fa5cf;
  transition: color 0.25s;
}
.lane summary::-webkit-details-marker { display: none; }
.lane summary::before { content: '▸ '; color: var(--ink-faint); }
.lane[open] summary::before { content: '▾ '; }
.lane summary:hover { color: #9fd7ff; }
.lane.twist summary { color: #c9a35a; }
.lane.twist summary:hover { color: #ffd98f; }

.lane-body { margin-top: 10px; color: var(--ink-muted); font-size: 14px; }
.lane-body p + p { margin-top: 10px; }
.lane[open] .lane-body { animation: lane-in 0.35s ease; }
@keyframes lane-in { from { opacity: 0; transform: translateY(-3px); } to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: reduce) {
  .lane[open] .lane-body { animation: none; }
  .card, .mark { transition: none; }
}

/* ---------- drills (DIV-29) ---------- */
.quiz .scenario { color: var(--ink); font-size: 14.5px; line-height: 1.6; }
.qnum {
  display: inline-block; margin-right: 10px; padding: 2px 9px; border-radius: 999px;
  font-size: 11.5px; font-weight: 700; color: #9fd7ff;
  border: 1px solid #1e3a5a; background: rgba(20, 30, 50, 0.6);
}
.opts { display: flex; flex-direction: column; gap: 10px; margin-top: 16px; }
.opt {
  display: flex; gap: 12px; align-items: flex-start; text-align: left;
  width: 100%; cursor: pointer; font-size: 14px; color: var(--ink);
  background: rgba(20, 30, 50, 0.45); border: 1px solid var(--line);
  border-radius: 10px; padding: 12px 14px;
  transition: border-color 0.25s, background 0.25s, opacity 0.3s;
}
.opt:hover:not([disabled]) { border-color: var(--line-hover); background: rgba(30, 50, 80, 0.5); }
.opt[disabled] { cursor: default; }
.opt .letter {
  flex: 0 0 auto; width: 22px; height: 22px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 11.5px; font-weight: 700; color: #9fd7ff;
  border: 1px solid #1e3a5a;
}
.opt.right {
  border-color: rgba(255, 190, 90, 0.55); background: rgba(90, 65, 20, 0.25);
  box-shadow: 0 0 14px rgba(255, 190, 90, 0.15);
}
.opt.right .letter { color: #ffd98f; border-color: rgba(255, 190, 90, 0.5); }
.opt.chosen-wrong { border-color: rgba(140, 160, 190, 0.35); opacity: 0.75; }
.opt.faded { opacity: 0.45; }

.explain { margin-top: 16px; border-top: 1px solid rgba(80, 140, 200, 0.10); padding-top: 12px; }
.explain p { font-size: 13.5px; color: var(--ink-muted); margin-top: 8px; line-height: 1.55; }
.explain p b { color: #8fb8dc; }
.explain .exp-right { color: #d9c08a; }
.explain .exp-right b { color: #ffd98f; }

.drill-foot { text-align: center; margin-top: 36px; }

/* ---------- mock: external panel + booking CTA (DIV-30) ---------- */
.ext-panel { display: flex; flex-direction: column; gap: 14px; margin-top: 18px; }
.ext-mock {
  display: block; text-decoration: none; color: inherit;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 16px 18px; transition: border-color 0.3s, transform 0.3s;
}
.ext-mock:hover { border-color: var(--line-hover); transform: translateY(-1px); }
.ext-name { display: block; font-size: 14.5px; font-weight: 600; color: #cfe6ff; }
.ext-arrow { color: var(--ink-faint); font-weight: 400; }
.ext-note { display: block; margin-top: 5px; font-size: 13px; color: #7f9cba; line-height: 1.5; }

.book-cta {
  margin-top: 44px; text-align: center; padding: 30px 20px;
  border: 1px solid rgba(255, 190, 90, 0.2); border-radius: var(--radius);
  background: rgba(90, 65, 20, 0.12);
}
.book-cta p { color: #d9c08a; font-size: 14.5px; margin-bottom: 14px; }

/* ---------- footer ---------- */
.foot {
  margin-top: 90px; text-align: center; font-size: 12.5px; color: #3d5a78;
}
.foot .dot { margin: 0 8px; }
.foot time.stale { color: #c9a35a; border-bottom: 1px dotted #c9a35a; cursor: help; }

/* ---------- responsive ---------- */
@media (max-width: 560px) {
  .wrap { padding: 44px 16px 40px; }
  .step { padding: 18px 16px; }
  .prog { display: none; }
}

/* ---------- reduced motion: ambient animation off (R16) ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .step, .btn { transition: none; }
}