/* ============================================================
   CoreSkillAI — Design System
   Human Ability Testing Platform
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');

/* ── Tokens ─────────────────────────────────────────────── */
:root {
  --primary:        #6366f1;
  --primary-hover:  #4f46e5;
  --primary-glow:   rgba(99,102,241,0.25);
  --secondary:      #06b6d4;
  --success:        #10b981;
  --warning:        #f59e0b;
  --danger:         #ef4444;

  /* Light theme */
  --bg:             #f5f7ff;
  --bg-alt:         #eef0fb;
  --surface:        #ffffff;
  --surface-2:      #f8f9ff;
  --border:         #e4e6f0;
  --text:           #0f1629;
  --text-2:         #4a5578;
  --text-3:         #8a93b8;

  --nav-h:    64px;
  --radius:   14px;
  --radius-s: 8px;
  --radius-l: 20px;
  --shadow:   0 1px 4px rgba(0,0,0,.06), 0 4px 16px rgba(0,0,0,.06);
  --shadow-l: 0 8px 32px rgba(0,0,0,.10);
  --trans:    .18s ease;
}

[data-theme="dark"] {
  --bg:       #07070f;
  --bg-alt:   #0c0c18;
  --surface:  #0f0f1c;
  --surface-2:#141425;
  --border:   #1e1e32;
  --text:     #f0f1ff;
  --text-2:   #9095c0;
  --text-3:   #5a608a;
  --shadow:   0 1px 4px rgba(0,0,0,.4), 0 4px 16px rgba(0,0,0,.3);
  --shadow-l: 0 8px 32px rgba(0,0,0,.5);
}

/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  transition: background var(--trans), color var(--trans);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: inherit; }

/* ── Navigation ─────────────────────────────────────────── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h);
  background: rgba(7,7,15,.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background var(--trans);
}
[data-theme="light"] .nav {
  background: rgba(245,247,255,.9);
}
.nav-inner {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  height: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.nav-logo {
  font-size: 1.2rem; font-weight: 800; letter-spacing: -.5px;
  color: var(--text);
  display: flex; align-items: center; gap: 6px;
}
.nav-logo span { color: var(--primary); }
.nav-logo svg { width: 28px; height: 28px; }
.nav-links {
  display: flex; align-items: center; gap: 4px;
}
.nav-links a {
  color: var(--text-2); font-size: .9rem; font-weight: 500;
  padding: 6px 12px; border-radius: var(--radius-s);
  transition: color var(--trans), background var(--trans);
}
.nav-links a:hover { color: var(--text); background: var(--surface-2); }
.nav-right { display: flex; align-items: center; gap: 8px; }

.nav-lang {
  appearance: none; background: var(--surface); border: 1px solid var(--border);
  color: var(--text-2); font-size: .82rem; font-weight: 500;
  padding: 6px 28px 6px 10px; border-radius: var(--radius-s);
  cursor: pointer; transition: all var(--trans);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' fill='none'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%236366f1' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 8px center;
}
.nav-lang:hover { border-color: var(--primary); color: var(--text); }

.theme-btn {
  width: 36px; height: 36px; border-radius: var(--radius-s);
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text-2); font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--trans);
}
.theme-btn:hover { border-color: var(--primary); color: var(--primary); }

.btn-cta {
  background: var(--primary); color: #fff; border: none;
  font-size: .88rem; font-weight: 600; padding: 8px 18px;
  border-radius: var(--radius-s); transition: background var(--trans), transform var(--trans);
}
.btn-cta:hover { background: var(--primary-hover); transform: translateY(-1px); }

.nav-mobile-toggle {
  display: none; width: 36px; height: 36px; border-radius: var(--radius-s);
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text); align-items: center; justify-content: center; font-size: 1.1rem;
}

/* ── Page wrapper ───────────────────────────────────────── */
.page { padding-top: var(--nav-h); }

/* ── Hero ───────────────────────────────────────────────── */
.hero {
  text-align: center; padding: 80px 24px 60px;
  background: radial-gradient(ellipse 80% 60% at 50% 0%, var(--primary-glow), transparent 70%);
  position: relative; overflow: hidden;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 100px; padding: 6px 16px; font-size: .82rem;
  color: var(--text-2); font-weight: 500; margin-bottom: 24px;
}
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--success); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.4} }

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 900; line-height: 1.15;
  letter-spacing: -.03em; margin-bottom: 18px;
  background: linear-gradient(135deg, var(--text) 40%, var(--primary) 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  font-size: clamp(.95rem, 2vw, 1.15rem); color: var(--text-2);
  max-width: 560px; margin: 0 auto 36px;
}
.hero-btns { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }

/* ── Buttons ────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: var(--radius-s);
  font-size: .95rem; font-weight: 600; border: none;
  transition: all var(--trans); cursor: pointer;
}
.btn:active { transform: scale(.98); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-2px); box-shadow: 0 6px 20px var(--primary-glow); }
.btn-secondary {
  background: var(--surface); color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }
.btn-lg { padding: 16px 36px; font-size: 1.05rem; border-radius: var(--radius); }
.btn-sm { padding: 8px 18px; font-size: .85rem; }

/* ── Stats bar ──────────────────────────────────────────── */
.stats-bar {
  max-width: 900px; margin: 0 auto 48px;
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1px; background: var(--border); border-radius: var(--radius);
  overflow: hidden; border: 1px solid var(--border);
}
.stat-item {
  background: var(--surface); padding: 16px 20px; text-align: center;
}
.stat-num { font-size: 1.5rem; font-weight: 800; color: var(--primary); }
.stat-label { font-size: .78rem; color: var(--text-3); font-weight: 500; text-transform: uppercase; letter-spacing: .05em; margin-top: 2px; }

/* ── Section ────────────────────────────────────────────── */
.section { max-width: 1200px; margin: 0 auto; padding: 48px 24px; }
.section-sm { max-width: 800px; }
.section-title {
  font-size: clamp(1.4rem, 3vw, 1.9rem); font-weight: 800;
  letter-spacing: -.03em; margin-bottom: 8px;
}
.section-subtitle { color: var(--text-2); font-size: .95rem; margin-bottom: 36px; }

/* ── Test cards grid ────────────────────────────────────── */
.tests-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}

.test-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-l); padding: 0; overflow: hidden;
  transition: transform var(--trans), box-shadow var(--trans), border-color var(--trans);
  display: flex; flex-direction: column;
  text-decoration: none; color: inherit;
}
.test-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-l); border-color: var(--primary); }
.test-card-accent { height: 4px; }
.test-card-body { padding: 22px; flex: 1; display: flex; flex-direction: column; gap: 12px; }
.test-icon { font-size: 2rem; line-height: 1; }
.test-card h3 { font-size: 1rem; font-weight: 700; }
.test-card p { font-size: .85rem; color: var(--text-2); line-height: 1.5; flex: 1; }
.test-card-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 4px; }
.badge {
  font-size: .72rem; font-weight: 600; padding: 3px 9px;
  border-radius: 100px; border: 1px solid var(--border);
  color: var(--text-2); background: var(--surface-2);
}
.badge-green { border-color: rgba(16,185,129,.3); color: var(--success); background: rgba(16,185,129,.08); }
.badge-yellow { border-color: rgba(245,158,11,.3); color: var(--warning); background: rgba(245,158,11,.08); }
.badge-red { border-color: rgba(239,68,68,.3); color: var(--danger); background: rgba(239,68,68,.08); }
.badge-primary { border-color: rgba(99,102,241,.3); color: var(--primary); background: rgba(99,102,241,.08); }

.test-card-foot {
  padding: 14px 22px; border-top: 1px solid var(--border);
  background: var(--surface-2);
  font-size: .82rem; font-weight: 600; color: var(--primary);
  display: flex; align-items: center; justify-content: space-between;
}
.test-card-foot span { color: var(--text-3); font-weight: 400; }

/* ── How it works ───────────────────────────────────────── */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 24px; }
.step {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 28px 24px; text-align: center;
  position: relative;
}
.step-num {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--primary-glow); border: 1px solid var(--primary);
  color: var(--primary); font-weight: 800; font-size: .95rem;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px;
}
.step h4 { font-size: .95rem; font-weight: 700; margin-bottom: 8px; }
.step p { font-size: .85rem; color: var(--text-2); }

/* ── AdSense ────────────────────────────────────────────── */
.ad-wrap {
  max-width: 900px; margin: 32px auto; padding: 0 24px;
  display: flex; justify-content: center;
}
.ad-label {
  font-size: .7rem; color: var(--text-3); text-align: center;
  text-transform: uppercase; letter-spacing: .06em; margin-bottom: 6px;
}

/* ── Footer ─────────────────────────────────────────────── */
footer {
  background: var(--surface); border-top: 1px solid var(--border);
  padding: 48px 24px 32px; margin-top: 80px;
}
.footer-inner {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
}
.footer-brand .logo { font-size: 1.1rem; font-weight: 800; color: var(--text); margin-bottom: 10px; }
.footer-brand .logo span { color: var(--primary); }
.footer-brand p { font-size: .85rem; color: var(--text-2); line-height: 1.6; }
footer h4 { font-size: .82rem; font-weight: 700; text-transform: uppercase; letter-spacing: .06em; color: var(--text-3); margin-bottom: 14px; }
footer ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
footer ul a { font-size: .88rem; color: var(--text-2); transition: color var(--trans); }
footer ul a:hover { color: var(--primary); }
.footer-bottom {
  max-width: 1200px; margin: 32px auto 0;
  padding-top: 24px; border-top: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
  font-size: .82rem; color: var(--text-3);
}
.footer-bottom a { color: var(--text-3); }
.footer-bottom a:hover { color: var(--primary); }

/* ── Test page layout ───────────────────────────────────── */
.test-page { max-width: 760px; margin: 0 auto; padding: 48px 24px 80px; }
.test-page-header { margin-bottom: 36px; }
.test-back {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--text-2); font-size: .85rem; font-weight: 500;
  margin-bottom: 20px; transition: color var(--trans);
}
.test-back:hover { color: var(--primary); }
.test-page-header h1 {
  font-size: clamp(1.6rem, 4vw, 2.2rem); font-weight: 900;
  letter-spacing: -.03em; margin-bottom: 10px;
}
.test-page-header p { font-size: .95rem; color: var(--text-2); }
.test-meta { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }

/* ── Test interface card ────────────────────────────────── */
.test-card-ui {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-l); overflow: hidden;
  box-shadow: var(--shadow-l);
}
.test-ui-header {
  padding: 20px 24px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.test-ui-title { font-size: .9rem; font-weight: 700; }
.test-progress { display: flex; align-items: center; gap: 8px; }
.progress-dots { display: flex; gap: 5px; }
.progress-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--border); transition: background .3s;
}
.progress-dot.done { background: var(--primary); }
.progress-dot.active { background: var(--primary); box-shadow: 0 0 0 3px var(--primary-glow); }

.test-ui-body { padding: 40px 24px; min-height: 300px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 24px; }

/* ── Reaction Time ──────────────────────────────────────── */
.rt-box {
  width: 100%; max-width: 440px; height: 200px;
  border-radius: var(--radius-l); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem; font-weight: 800; letter-spacing: -.02em;
  transition: background .12s, color .12s;
  user-select: none; -webkit-user-select: none;
  border: 2px solid var(--border);
}
.rt-idle     { background: var(--surface-2); color: var(--text-2); border-color: var(--border); }
.rt-waiting  { background: #1a0505; color: #ef4444; border-color: #ef4444; }
[data-theme="light"] .rt-waiting { background: #fff0f0; color: #dc2626; }
.rt-go       { background: #052010; color: #10b981; border-color: #10b981; }
[data-theme="light"] .rt-go { background: #f0fff6; color: #059669; }
.rt-tooearly { background: #1a1005; color: #f59e0b; border-color: #f59e0b; }
[data-theme="light"] .rt-tooearly { background: #fffbf0; color: #d97706; }
.rt-done     { background: var(--surface-2); color: var(--primary); border-color: var(--primary); font-size: 1.8rem; }

.rt-trials { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; margin-top: 8px; }
.rt-trial-chip {
  font-size: .8rem; font-weight: 600; padding: 4px 12px;
  border-radius: 100px; background: var(--surface-2); color: var(--text-2);
  border: 1px solid var(--border);
}
.rt-trial-chip.best { border-color: var(--success); color: var(--success); background: rgba(16,185,129,.08); }

/* ── Memory test ────────────────────────────────────────── */
.memory-display {
  font-size: 3rem; font-weight: 900; letter-spacing: .15em;
  color: var(--primary); min-height: 80px;
  display: flex; align-items: center; justify-content: center;
  background: var(--surface-2); border-radius: var(--radius);
  padding: 20px 32px; width: 100%; max-width: 440px; text-align: center;
}
.memory-input {
  font-size: 2rem; font-weight: 700; text-align: center; letter-spacing: .2em;
  background: var(--surface-2); border: 2px solid var(--border);
  color: var(--text); padding: 16px 24px; border-radius: var(--radius);
  width: 100%; max-width: 440px; transition: border-color var(--trans);
  font-family: inherit;
}
.memory-input:focus { outline: none; border-color: var(--primary); }

/* ── Pattern recognition ────────────────────────────────── */
.pattern-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 8px; width: 240px; height: 240px;
}
.pattern-cell {
  background: var(--surface-2); border-radius: var(--radius-s);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
}
.pattern-cell.missing { border: 2px dashed var(--primary); background: var(--bg); }
.pattern-choices { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; width: 100%; max-width: 440px; }
.pattern-choice {
  aspect-ratio: 1; background: var(--surface-2); border-radius: var(--radius-s);
  border: 2px solid var(--border); cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--trans);
}
.pattern-choice:hover { border-color: var(--primary); transform: scale(1.04); }
.pattern-choice.selected { border-color: var(--primary); background: var(--primary-glow); }
.pattern-choice.correct { border-color: var(--success); background: rgba(16,185,129,.1); }
.pattern-choice.wrong { border-color: var(--danger); background: rgba(239,68,68,.1); }
.pattern-question { font-size: .85rem; color: var(--text-2); text-align: center; }

/* ── Color vision ───────────────────────────────────────── */
.hue-test-area { width: 100%; max-width: 480px; }
.hue-row { display: flex; gap: 4px; align-items: center; flex-wrap: wrap; }
.hue-anchor { width: 36px; height: 36px; border-radius: var(--radius-s); flex-shrink: 0; border: 2px solid var(--border); }
.hue-chips { display: flex; gap: 4px; flex-wrap: nowrap; flex: 1; overflow-x: auto; cursor: grab; padding: 4px 0; }
.hue-chip {
  width: 30px; height: 36px; border-radius: var(--radius-s);
  flex-shrink: 0; cursor: grab; border: 2px solid transparent;
  transition: transform .1s; touch-action: none;
}
.hue-chip:active { cursor: grabbing; transform: scale(1.1); }
.hue-chip.dragging { opacity: .8; transform: scale(1.1); }

/* ── Big Five / EQ ──────────────────────────────────────── */
.q-counter { font-size: .8rem; color: var(--text-3); font-weight: 500; }
.question-text { font-size: 1.05rem; font-weight: 600; text-align: center; max-width: 440px; line-height: 1.5; }
.likert {
  display: flex; gap: 8px; justify-content: center; flex-wrap: wrap;
  width: 100%; max-width: 440px;
}
.likert-btn {
  flex: 1; min-width: 48px; padding: 10px 4px;
  background: var(--surface-2); border: 2px solid var(--border);
  border-radius: var(--radius-s); font-size: .8rem; font-weight: 600;
  color: var(--text-2); transition: all var(--trans); cursor: pointer;
  display: flex; flex-direction: column; align-items: center; gap: 4px;
}
.likert-btn:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-glow); }
.likert-btn.selected { border-color: var(--primary); background: var(--primary); color: #fff; }
.likert-num { font-size: 1.1rem; font-weight: 800; }
.likert-label { font-size: .65rem; text-align: center; line-height: 1.2; }
.q-progress-bar {
  width: 100%; max-width: 440px; height: 4px;
  background: var(--border); border-radius: 100px; overflow: hidden;
}
.q-progress-fill { height: 100%; background: var(--primary); border-radius: 100px; transition: width .3s; }

/* ── Focus / Stroop ─────────────────────────────────────── */
.stroop-word {
  font-size: 3.5rem; font-weight: 900; letter-spacing: -.03em;
  text-align: center; user-select: none; transition: opacity .1s;
}
.color-buttons { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; max-width: 440px; }
.color-btn {
  padding: 14px 24px; border-radius: var(--radius); border: 2px solid transparent;
  font-size: .9rem; font-weight: 700; min-width: 100px;
  transition: all var(--trans); cursor: pointer;
}

/* ── Typing Speed ───────────────────────────────────────── */
.typing-text {
  font-size: 1.05rem; line-height: 1.8; max-width: 540px;
  color: var(--text-2); background: var(--surface-2);
  padding: 20px 24px; border-radius: var(--radius); position: relative;
}
.typing-text .typed { color: var(--primary); }
.typing-text .wrong-char { color: var(--danger); text-decoration: underline; }
.typing-text .cursor {
  display: inline-block; width: 2px; height: 1.2em;
  background: var(--primary); animation: blink .6s step-end infinite; vertical-align: text-bottom;
}
@keyframes blink { 50% { opacity: 0; } }
.typing-input {
  width: 100%; max-width: 540px; padding: 14px 18px;
  background: var(--surface-2); border: 2px solid var(--border);
  border-radius: var(--radius); font-size: 1rem; color: var(--text);
  font-family: 'Inter', monospace; resize: none; transition: border-color var(--trans);
}
.typing-input:focus { outline: none; border-color: var(--primary); }
.typing-stats { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }
.typing-stat-item { text-align: center; }
.typing-stat-num { font-size: 1.6rem; font-weight: 800; color: var(--primary); }
.typing-stat-label { font-size: .72rem; color: var(--text-3); font-weight: 500; }

/* ── Results ────────────────────────────────────────────── */
.results-panel {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-l); padding: 32px; margin-top: 24px;
  display: none; animation: fadeUp .4s ease;
}
.results-panel.show { display: block; }
@keyframes fadeUp { from { opacity:0; transform:translateY(16px); } to { opacity:1; transform:translateY(0); } }

.result-score-wrap { display: flex; align-items: center; gap: 32px; flex-wrap: wrap; justify-content: center; margin-bottom: 28px; }
.score-ring-wrap { position: relative; width: 130px; height: 130px; flex-shrink: 0; }
.score-ring-svg { transform: rotate(-90deg); width: 130px; height: 130px; }
.score-ring-bg { fill: none; stroke: var(--border); stroke-width: 10; }
.score-ring-fill { fill: none; stroke-width: 10; stroke-linecap: round; transition: stroke-dashoffset 1.2s cubic-bezier(.4,0,.2,1); }
.score-ring-text {
  position: absolute; inset: 0; display: flex; flex-direction: column;
  align-items: center; justify-content: center;
}
.score-ring-num { font-size: 1.5rem; font-weight: 900; color: var(--text); }
.score-ring-unit { font-size: .7rem; font-weight: 600; color: var(--text-3); }

.result-info h2 { font-size: 1.3rem; font-weight: 800; margin-bottom: 6px; }
.result-info .result-desc { font-size: .9rem; color: var(--text-2); line-height: 1.5; }
.result-percentile {
  margin-top: 10px; font-size: .85rem; font-weight: 600;
  color: var(--primary); background: var(--primary-glow);
  display: inline-block; padding: 4px 12px; border-radius: 100px;
}

.bell-curve-wrap { margin: 24px 0; }
.bell-curve-wrap canvas { width: 100%; border-radius: var(--radius-s); }

.result-breakdown {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 12px; margin-top: 20px;
}
.breakdown-item {
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: var(--radius-s); padding: 14px;
  text-align: center;
}
.breakdown-item .b-label { font-size: .72rem; font-weight: 600; color: var(--text-3); text-transform: uppercase; letter-spacing: .05em; }
.breakdown-item .b-val { font-size: 1.2rem; font-weight: 800; color: var(--text); margin-top: 4px; }
.breakdown-item .b-sub { font-size: .7rem; color: var(--text-3); margin-top: 2px; }

/* ── Big Five Radar ─────────────────────────────────────── */
.radar-wrap { display: flex; justify-content: center; }
.radar-wrap canvas { max-width: 320px; width: 100%; }
.trait-bars { display: flex; flex-direction: column; gap: 14px; margin-top: 20px; }
.trait-bar-item {}
.trait-bar-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 6px; }
.trait-name { font-size: .85rem; font-weight: 600; }
.trait-pct { font-size: .82rem; color: var(--text-2); font-weight: 500; }
.trait-bar-track { height: 8px; background: var(--border); border-radius: 100px; overflow: hidden; }
.trait-bar-fill { height: 100%; border-radius: 100px; transition: width 1s cubic-bezier(.4,0,.2,1); }

/* ── Share buttons ──────────────────────────────────────── */
.share-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 24px; }
.share-btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 18px; border-radius: var(--radius-s); font-size: .85rem;
  font-weight: 600; border: 1px solid var(--border); background: var(--surface-2);
  color: var(--text); cursor: pointer; transition: all var(--trans);
}
.share-btn:hover { border-color: var(--primary); color: var(--primary); }
.share-btn.copied { border-color: var(--success); color: var(--success); }

/* ── Try next ───────────────────────────────────────────── */
.next-tests { margin-top: 40px; }
.next-tests h3 { font-size: 1rem; font-weight: 700; margin-bottom: 16px; }
.next-tests-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; }
.next-test-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 16px;
  transition: all var(--trans); text-decoration: none; color: inherit;
  display: flex; flex-direction: column; gap: 6px;
}
.next-test-card:hover { border-color: var(--primary); transform: translateY(-2px); }
.next-test-card .icon { font-size: 1.5rem; }
.next-test-card h4 { font-size: .85rem; font-weight: 700; }
.next-test-card span { font-size: .75rem; color: var(--text-3); }

/* ── Instruction page ───────────────────────────────────── */
.instruction-card {
  background: var(--surface-2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px; margin-bottom: 24px;
}
.instruction-card h3 { font-size: .9rem; font-weight: 700; margin-bottom: 12px; }
.instruction-card ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.instruction-card li {
  display: flex; gap: 10px; align-items: flex-start;
  font-size: .88rem; color: var(--text-2);
}
.instruction-card li::before {
  content: '→'; color: var(--primary); font-weight: 700; flex-shrink: 0; margin-top: 1px;
}

/* ── About page ─────────────────────────────────────────── */
.about-hero { text-align: center; padding: 60px 24px 48px; }
.science-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 20px; margin-top: 32px; }
.science-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
}
.science-card h3 { font-size: .95rem; font-weight: 700; margin: 12px 0 8px; }
.science-card p { font-size: .85rem; color: var(--text-2); line-height: 1.6; }

/* ── Loading spinner ────────────────────────────────────── */
.spinner {
  width: 36px; height: 36px; border-radius: 50%;
  border: 3px solid var(--border); border-top-color: var(--primary);
  animation: spin .8s linear infinite; margin: 0 auto;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 900px) {
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-mobile-toggle { display: flex; }
  .hero { padding: 56px 20px 48px; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .test-ui-body { padding: 28px 16px; }
  .result-score-wrap { flex-direction: column; gap: 20px; }
  .score-ring-wrap { align-self: center; }
  .likert { gap: 6px; }
  .likert-btn { padding: 8px 2px; min-width: 40px; }
  .likert-label { display: none; }
  .stroop-word { font-size: 2.5rem; }
  .memory-display { font-size: 2rem; }
}

/* ── Mobile nav ─────────────────────────────────────────── */
.mobile-nav {
  display: none; position: fixed; top: var(--nav-h); left: 0; right: 0;
  background: var(--surface); border-bottom: 1px solid var(--border);
  padding: 16px 24px; z-index: 99; flex-direction: column; gap: 8px;
}
.mobile-nav.open { display: flex; }
.mobile-nav a {
  color: var(--text); font-size: .95rem; font-weight: 500;
  padding: 10px 0; border-bottom: 1px solid var(--border);
}
.mobile-nav a:last-child { border-bottom: none; }

/* ── Utilities ──────────────────────────────────────────── */
.text-center { text-align: center; }
.text-primary { color: var(--primary); }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.hidden { display: none !important; }
.fade-in { animation: fadeUp .4s ease; }