:root {
  --bg: #EEF5EC;
  --bg-raised: #FFFFFF;
  --ink: #1E2A1B;
  --ink-soft: #57684F;
  --line: rgba(30, 42, 27, .12);
  --orange: #E85E12;
  --orange-fill: #FF6B1A;
  --orange-soft: #FFE3CC;
  --green: #2F6B3C;
  --green-soft: #DCEEDD;
  --red: #C6392F;
  --red-soft: #FBDFDB;
  --gold: #C98A22;
  --gold-soft: #F6E4BE;
  --radius-lg: 18px;
  --radius-md: 14px;
  --radius-pill: 999px;
  --shadow-sm: 0 1px 3px rgba(30, 42, 27, .08);
  --ring-track: #C9D3C4;

  --trail-path-bed: rgba(255, 255, 255, .6);
  --trail-track: rgba(255, 255, 255, .92);
  --trail-checkpoint-bg: #FFFFFF;
  --trail-chip-bg: rgba(255, 255, 255, .82);
}

:root[data-theme="dark"] {
  --bg: #1B2417;
  --bg-raised: #26311F;
  --ink: #ECF1E6;
  --ink-soft: #9CAD93;
  --line: rgba(236, 241, 230, .14);
  --orange: #FF8A42;
  --orange-fill: #FF7D33;
  --orange-soft: #3D2716;
  --green: #6BBD79;
  --green-soft: #223A26;
  --red: #E76A62;
  --red-soft: #3D1C18;
  --gold: #F0B85A;
  --gold-soft: #3D2E12;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, .35);
  --ring-track: #3A4A34;

  --trail-path-bed: rgba(10, 16, 10, .45);
  --trail-track: rgba(255, 255, 255, .7);
  --trail-checkpoint-bg: #26311F;
  --trail-chip-bg: rgba(38, 49, 31, .82);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: 'Karla', system-ui, -apple-system, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
img, svg { max-width: 100%; display: block; }

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px;
}

h1, h2, h3 {
  font-family: 'Bricolage Grotesque', system-ui, sans-serif;
  font-weight: 800;
  line-height: 1.18;
  text-wrap: balance;
  margin: 0 0 .5em;
}

h1 { font-size: clamp(1.5rem, 4.5vw, 2.1rem); }
h3 { font-size: 1.05rem; font-weight: 700; }

p { margin: 0 0 1em; }
.muted { color: var(--ink-soft); }

a:focus-visible, button:focus-visible, input:focus-visible, .quiz-option:focus-within {
  outline: 2px solid var(--green);
  outline-offset: 2px;
}

/* ---------- header ---------- */
.site-header {
  background: var(--bg-raised);
  border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 40;
}
.site-header .container {
  padding-top: 14px;
  padding-bottom: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.header-start {
  display: flex;
  align-items: center;
  gap: 28px;
  min-width: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  color: var(--ink);
  flex: none;
}

.brand-text { display: flex; align-items: baseline; gap: 6px; }
.brand-sub { font-weight: 500; color: var(--ink-soft); font-size: .85rem; }

.site-nav {
  display: flex;
  align-items: center;
  gap: 2px;
  min-width: 0;
  overflow-x: auto;
  overflow-y: hidden;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.site-nav::-webkit-scrollbar { display: none; }

.site-nav a {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 700;
  font-size: .85rem;
  text-decoration: none;
  color: var(--ink-soft);
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  white-space: nowrap;
  transition: background-color .12s ease, color .12s ease;
}

.site-nav a:hover { color: var(--ink); background: var(--line); }
.site-nav a.active { color: var(--green); background: var(--green-soft); }

.badge-new {
  display: inline-block;
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: .6rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: #fff;
  background: var(--orange-fill);
  padding: 2px 7px;
  border-radius: var(--radius-pill);
  margin-left: 4px;
  vertical-align: 2px;
  white-space: nowrap;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: var(--bg-raised);
  color: var(--ink);
  cursor: pointer;
  flex: none;
}

.theme-toggle:hover { border-color: var(--ink-soft); }

.theme-toggle svg { width: 18px; height: 18px; display: block; }

.theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

/* ---------- hero + trajectory ---------- */
.hero { padding: 28px 0 6px; }

.kicker {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 700;
  font-size: .7rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--green);
  margin: 0 0 10px;
}

.hero p.lead {
  color: var(--ink-soft);
  max-width: 52ch;
  font-size: .98rem;
}

.trajectory {
  position: relative;
  margin: 6px 0 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  background: var(--bg-raised) url('/img/hero-trail-day.png') center / cover no-repeat;
  overflow: hidden;
  animation: trail-reveal .7s ease-out both;
}

:root[data-theme="dark"] .trajectory {
  background-image: url('/img/hero-trail-night.png');
}

.traj-label {
  position: absolute;
  top: 14px;
  left: 16px;
  right: 16px;
  display: flex;
  justify-content: space-between;
  z-index: 2;
}

.traj-label span {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 700;
  font-size: .7rem;
  color: var(--ink-soft);
  background: var(--trail-chip-bg);
  backdrop-filter: blur(4px);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
}

.trajectory svg { display: block; width: 100%; height: auto; }

#traj-track, #traj-fill, .trail-checkpoints {
  filter: drop-shadow(0 1px 2px rgba(0, 0, 0, .35));
}

#traj-fill {
  transition: stroke-dashoffset 1.3s cubic-bezier(.16, .84, .44, 1) .2s;
}

#traj-dot {
  transform-box: fill-box;
  transform-origin: center;
  transition: cx 1.3s cubic-bezier(.16, .84, .44, 1) .2s, cy 1.3s cubic-bezier(.16, .84, .44, 1) .2s;
  animation: trail-dot-pulse 2.4s ease-in-out infinite;
  filter: drop-shadow(0 2px 3px rgba(0, 0, 0, .28));
}

.traj-note {
  position: relative;
  z-index: 2;
  font-size: .8rem;
  color: #F4F7F2;
  text-shadow: 0 1px 3px rgba(0, 0, 0, .55);
  margin: 0;
  padding: 22px 18px 16px;
  background: linear-gradient(to top, rgba(10, 16, 10, .45), transparent);
}

@keyframes trail-reveal {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes trail-dot-pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.2); }
}

/* ---------- module cards ---------- */
.module-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 4px 0 8px;
  margin: 0;
  list-style: none;
}

.module-card {
  display: flex;
  gap: 16px;
  align-items: center;
  padding: 18px;
  background: var(--bg-raised);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.module-card { align-items: flex-start; }
.module-card .badge-ring { flex: none; }
.module-card .body { flex: 1; min-width: 0; padding-top: 4px; }
.badge-ring.accent-gold { color: var(--gold); }
.badge-ring.accent-green { color: var(--green); }
.badge-ring.accent-orange { color: var(--orange); }

.module-kicker {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: .68rem;
  letter-spacing: .05em;
  text-transform: uppercase;
  margin: 0 0 6px;
}
.module-kicker.accent-gold { color: var(--gold); }
.module-kicker.accent-green { color: var(--green); }
.module-kicker.accent-orange { color: var(--orange); }

.module-card h3 { margin: 0 0 6px; font-size: 1.02rem; }
.module-card p { font-size: .86rem; color: var(--ink-soft); margin: 0 0 14px; }

.btn-row { display: flex; gap: 8px; flex-wrap: wrap; }

.btn {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 700;
  font-size: .82rem;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  text-decoration: none;
  border: 1.5px solid var(--green);
  color: var(--green);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 40px;
  background: transparent;
  cursor: pointer;
}

.btn.solid { background: var(--orange-fill); border-color: var(--orange-fill); color: #fff; }
.btn.done { background: var(--green-soft); border-color: var(--green-soft); color: var(--green); cursor: default; }
.btn:active { transform: translateY(1px); }
.btn.full { width: 100%; justify-content: center; font-size: .95rem; padding: 14px; }

.empty-state {
  padding: 20px;
  background: var(--bg-raised);
  border-radius: var(--radius-lg);
  color: var(--ink-soft);
  font-size: .9rem;
}

/* ---------- breadcrumb-style nav ---------- */
.crumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .82rem;
  color: var(--ink-soft);
  margin: 18px 0 4px;
  flex-wrap: wrap;
}

.crumb a { color: var(--ink-soft); text-decoration: none; font-weight: 600; }
.crumb a:hover { color: var(--green); }
.crumb .sep { opacity: .5; }
.crumb .current { color: var(--ink); font-weight: 700; }

/* ---------- module summary ---------- */
.callout {
  background: var(--orange-soft);
  color: #8A3E0C;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  font-size: .85rem;
  margin: 18px 0 30px;
}

:root[data-theme="dark"] .callout { color: #FFCFA8; }

.module-content { max-width: 680px; margin: 0 auto; }
.summary-section { margin: 0 0 34px; }
.summary-section p { font-size: 1.1rem; line-height: 1.75; }
.summary-section ul { margin: 0 0 1em; padding-left: 1.3em; }
.summary-section li { margin-bottom: .5em; font-size: 1.08rem; line-height: 1.6; }
.summary-section h3 { font-size: 1.2rem; }

.page-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  flex-wrap: wrap;
}

.page-nav .spacer { flex: 1 1 auto; min-width: 8px; }

/* ---------- glossary tooltips ---------- */
.gloss {
  text-decoration: underline dotted 2px var(--green);
  text-underline-offset: 3px;
  cursor: help;
  font-weight: 700;
}

.gloss:hover, .gloss:focus-visible { color: var(--green); }

.gloss-tip {
  position: absolute;
  z-index: 60;
  max-width: 280px;
  background: var(--ink);
  color: var(--bg);
  font-size: .82rem;
  font-weight: 600;
  line-height: 1.4;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

/* ---------- diagrams ---------- */
.diagram-figure {
  margin: 18px 0;
  padding: 16px;
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}
.diagram-figure svg {
  display: block;
  width: 100%;
  height: auto;
  overflow: visible;
  font-family: 'Karla', sans-serif;
}
.diagram-figure figcaption {
  margin-top: 10px;
  font-size: .8rem;
  color: var(--ink-soft);
}

/* ---------- quiz ---------- */
.quiz-meta { font-size: .9rem; color: var(--ink-soft); margin: 0 0 20px; }

.quiz-card {
  background: var(--bg-raised);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 20px 18px 22px;
  margin-bottom: 16px;
}

.quiz-eyebrow {
  display: inline-block;
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: .68rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--green);
  background: var(--green-soft);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  margin-bottom: 12px;
}

.quiz-card h3 { font-size: 1rem; margin: 0 0 14px; line-height: 1.45; }

.quiz-options { display: flex; flex-direction: column; gap: 9px; margin: 0; padding: 0; list-style: none; }

.quiz-option {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 13px 14px;
  border-radius: 12px;
  border: 1.5px solid var(--line);
  font-size: .92rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--bg-raised);
  transition: border-color .12s ease;
}

.quiz-option:hover { border-color: var(--green); }

.quiz-option input {
  margin-top: 3px;
  accent-color: var(--green);
  width: 18px;
  height: 18px;
  flex: none;
}

.quiz-option b {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: .78rem;
  color: var(--ink-soft);
  flex: none;
}

.quiz-option.correct { border-color: var(--green); background: var(--green-soft); }
.quiz-option.wrong { border-color: var(--red); background: var(--red-soft); }

.quiz-feedback {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: 14px;
  padding: 12px 14px;
  background: var(--orange-soft);
  border-radius: 12px;
  font-size: .85rem;
  font-weight: 600;
  color: #8A3E0C;
}

:root[data-theme="dark"] .quiz-feedback { color: #FFCFA8; }

.quiz-feedback.warn { background: var(--red-soft); color: #7A251C; }
:root[data-theme="dark"] .quiz-feedback.warn { color: #FFD4CE; }

.quiz-feedback .fb-badge {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: .68rem;
  color: #fff;
  background: var(--gold);
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  flex: none;
  white-space: nowrap;
}

.quiz-feedback.warn .fb-badge { background: var(--red); }

.quiz-score {
  margin-top: 22px;
  padding: 18px;
  border-radius: var(--radius-lg);
  background: var(--green-soft);
  color: var(--green);
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 700;
  text-align: center;
  font-size: 1rem;
}

.exam-score {
  margin-top: 22px;
  padding: clamp(18px, 2.4vw, 24px) clamp(20px, 3vw, 28px);
  border-radius: var(--radius-lg);
  background: var(--tier-soft);
}

.exam-score.tier-fail { --tier-color: var(--red); --tier-soft: var(--red-soft); }
.exam-score.tier-consolidate { --tier-color: var(--gold); --tier-soft: var(--gold-soft); }
.exam-score.tier-good { --tier-color: var(--green); --tier-soft: var(--green-soft); }
.exam-score.tier-perfect { --tier-color: var(--green); --tier-soft: var(--green-soft); }

.exam-score-top { display: flex; align-items: center; gap: 16px; }

.exam-score-percent {
  flex: none;
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: clamp(2rem, 1.6rem + 1.6vw, 2.6rem);
  line-height: 1;
  color: var(--tier-color);
}

.exam-score-percent span { font-size: .5em; font-weight: 700; }

.exam-score-copy { display: flex; flex-direction: column; gap: 5px; min-width: 0; }

.exam-score-flag {
  display: inline-block;
  width: fit-content;
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: .68rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: #fff;
  background: var(--tier-color);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
}

.exam-score-title { margin: 0; font-size: clamp(1.05rem, .95rem + .4vw, 1.25rem); }

.exam-score-detail { margin: 16px 0 0; font-size: .85rem; font-weight: 600; color: var(--ink-soft); }

.exam-score-message { margin: 8px 0 0; font-size: .92rem; line-height: 1.55; }

.confetti-container {
  position: fixed;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 999;
}

.confetti-piece {
  position: absolute;
  top: -12px;
  width: 8px;
  height: 14px;
  opacity: .9;
  animation-name: confetti-fall;
  animation-timing-function: linear;
  animation-fill-mode: forwards;
}

@keyframes confetti-fall {
  to { transform: translateY(110vh) rotate(540deg); opacity: .3; }
}

@media (prefers-reduced-motion: reduce) {
  .confetti-piece { display: none; }
}

/* ---------- modal ---------- */
.modal {
  border: none;
  padding: 0;
  background: transparent;
  width: min(94vw, 560px);
  border-radius: var(--radius-lg);
}

.modal::backdrop {
  background: rgba(30, 42, 27, .45);
}

.modal-card {
  background: var(--bg-raised);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: clamp(26px, 3vw, 36px) clamp(24px, 3vw, 34px);
}

.modal-card h2 { font-size: clamp(1.15rem, 1rem + .6vw, 1.5rem); margin: 0 0 16px; }

.modal-list {
  margin: 0 0 22px;
  padding-left: 1.2em;
  font-size: clamp(.9rem, .82rem + .3vw, 1.05rem);
  line-height: 1.6;
  color: var(--ink-soft);
}

.modal-list li { margin-bottom: 10px; }
.modal-list li:last-child { margin-bottom: 0; }
.modal-list b { color: var(--ink); }

/* ---------- exam simulation ---------- */
#exam-timer {
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  color: var(--ink);
}

.results-heading { margin: 28px 0 4px; font-size: 1.05rem; }

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 12px;
  margin: 16px 0 0;
}

.result-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
    text-align: center;
    gap: 8px;
    padding: 14px;
    background: var(--bg-raised);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.result-ring { flex: none; }

.result-label { display: flex; flex-direction: column; align-items: center; gap: 2px; min-width: 0; }

.result-order {
  font-family: 'Bricolage Grotesque', sans-serif;
  font-weight: 800;
  font-size: .7rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.result-title {
  font-size: .86rem;
  font-weight: 700;
  line-height: 1.3;
}

.ring-fill.tier-strong { stroke: var(--green); }
.ring-fill.tier-medium { stroke: var(--gold); }
.ring-fill.tier-weak { stroke: var(--red); }

/* ---------- error page ---------- */
.error-page { padding: 28px 0 6px; max-width: 560px; }
.error-page .btn-row { margin-top: 22px; }
.error-request-id { margin-top: 22px; font-size: .8rem; }
.error-request-id code { background: var(--line); padding: 2px 6px; border-radius: 6px; }
.error-page .summary-section { margin-top: 34px; }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); margin-top: 48px; padding: 24px 0; }
.site-footer p { font-size: .78rem; color: var(--ink-soft); margin: 0; }
.footer-links { display: flex; gap: 16px; margin-top: 10px; }
.footer-links a { font-size: .78rem; color: var(--ink-soft); font-weight: 600; text-decoration: none; }
.footer-links a:hover { color: var(--green); }


@media (min-width: 1040px) {
  .container { max-width: 1040px; }

  .crumb,
  .hero,
  .trajectory,
  h1,
  .quiz-meta,
  .callout,
  .summary-section,
  .quiz-card,
  #quiz-form,
  #exam-form,
  .quiz-score,
  .exam-score,
  .page-nav,
  .empty-state {
    
    margin-left: auto;
    margin-right: auto;
  }

  .module-list {
    max-width: 1040px;
    margin: 0 auto;
    gap: 16px;
  }
}

@media (min-width: 1400px) {
  .container { max-width: 1240px; }

  .module-list {
    max-width: 1240px;
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 560px) {
  .header-start { gap: 14px; }
  .brand-sub { display: none; }
  .site-nav a { padding: 8px 10px; font-size: .8rem; }
}

@media (max-width: 400px) {
  .site-nav { gap: 0; }
  .badge-new { font-size: 0; padding: 0; width: 7px; height: 7px; border-radius: 50%; vertical-align: middle; }
}

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