/* ===== Design tokens ===== */
:root, [data-theme="light"] {
  --color-bg: #f7f6f2;
  --color-surface: #ffffff;
  --color-surface-2: #fbfbf9;
  --color-surface-offset: #f0eee8;
  --color-divider: #e1ddd5;
  --color-border: #d4d1ca;

  --color-text: #23261f;
  --color-text-muted: #6c6e63;
  --color-text-faint: #a6a89c;
  --color-text-inverse: #f9f8f4;

  --color-primary: #01696f;
  --color-primary-hover: #0c4e54;
  --color-primary-active: #0f3638;
  --color-primary-highlight: #cedcd8;

  --color-warning: #964219;
  --color-warning-hover: #713417;
  --color-warning-highlight: #f0ddce;

  --color-yes-bg: #01696f;
  --color-yes-text: #ffffff;
  --color-no-bg: transparent;

  --shadow-card: 0 1px 2px rgba(20, 24, 20, 0.05), 0 1px 12px rgba(20, 24, 20, 0.04);
}

[data-theme="dark"] {
  --color-bg: #14171a;
  --color-surface: #1c2023;
  --color-surface-2: #20252a;
  --color-surface-offset: #262b30;
  --color-divider: #33393f;
  --color-border: #3a4046;

  --color-text: #eef0ee;
  --color-text-muted: #a3a9a5;
  --color-text-faint: #6b7178;
  --color-text-inverse: #14171a;

  --color-primary: #4bb8ae;
  --color-primary-hover: #6fcac0;
  --color-primary-active: #8ad6cd;
  --color-primary-highlight: #24403c;

  --color-warning: #e08a53;
  --color-warning-hover: #ed9d67;
  --color-warning-highlight: #3a2c22;

  --color-yes-bg: #4bb8ae;
  --color-yes-text: #0f1a19;
  --color-no-bg: transparent;

  --shadow-card: 0 1px 2px rgba(0, 0, 0, 0.4), 0 1px 12px rgba(0, 0, 0, 0.3);
}

:root {
  --font-display: 'General Sans', 'Segoe UI', sans-serif;
  --font-body: 'Satoshi', 'Segoe UI', sans-serif;

  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.82rem + 0.3vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1.02rem + 0.5vw, 1.375rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.1rem);
  --text-2xl: clamp(2rem, 1.3rem + 2.2vw, 3rem);

  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem;
  --space-5: 1.25rem; --space-6: 1.5rem; --space-8: 2rem; --space-10: 2.5rem;
  --space-12: 3rem; --space-16: 4rem; --space-20: 5rem; --space-24: 6rem;

  --radius-sm: 8px; --radius-md: 12px; --radius-lg: 20px;
  --transition: 180ms cubic-bezier(.4,0,.2,1);
}

/* ===== Base ===== */
* { box-sizing: border-box; }
html { color-scheme: light dark; }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  transition: background var(--transition), color var(--transition);
}
h1, h2, h3 { font-family: var(--font-display); margin: 0; color: var(--color-text); }
p { margin: 0; }
.wrap { max-width: 760px; margin: 0 auto; padding-inline: var(--space-6); }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 31;
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-divider);
}
.attribution-strip { position: sticky; top: var(--header-h, 90px); z-index: 30; }
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding-block: var(--space-4);
}
.brand { display: flex; align-items: center; gap: var(--space-3); color: var(--color-primary); }
.brand-name { font-family: var(--font-display); font-weight: 600; font-size: var(--text-sm); color: var(--color-text); letter-spacing: 0.01em; }
.brand-mark { flex-shrink: 0; display: block; object-fit: contain; }
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-sub { font-size: var(--text-xs); color: var(--color-text-muted); font-weight: 600; letter-spacing: 0.02em; }
.brand-stacked { flex-direction: column; align-items: flex-start; gap: var(--space-2); }
.brand-mark-wordmark { height: 40px; width: auto; }
.brand-stacked .brand-text { align-items: flex-start; }

.attribution-strip {
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  background: var(--color-primary-highlight);
  padding: var(--space-2) var(--space-4);
  border-bottom: 1px solid var(--color-divider);
}
.icon-btn {
  width: 38px; height: 38px; border-radius: 50%;
  border: 1px solid var(--color-border); background: var(--color-surface);
  display: grid; place-items: center; color: var(--color-text-muted);
  cursor: pointer; transition: border-color var(--transition), color var(--transition);
}
.icon-btn:hover { color: var(--color-primary); border-color: var(--color-primary); }
.icon-moon { display: none; }
[data-theme="dark"] .icon-sun { display: none; }
[data-theme="dark"] .icon-moon { display: block; }

/* ===== Progress bar ===== */
.progress-bar {
  position: sticky; top: var(--header-attr-h, 122px); z-index: 29;
  height: 3px; background: var(--color-divider);
}
.progress-fill {
  height: 100%; width: 0%;
  background: var(--color-primary);
  transition: width 220ms ease;
}

/* ===== Intro ===== */
.intro { padding-block: var(--space-10) var(--space-6); }
.eyebrow {
  font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--color-primary); font-weight: 600; margin-bottom: var(--space-2);
}
.intro h1 { font-size: var(--text-2xl); font-weight: 700; letter-spacing: -0.01em; margin-bottom: var(--space-2); }
.attribution { color: var(--color-text-muted); font-size: var(--text-sm); font-style: italic; margin-bottom: var(--space-4); }
.lede { color: var(--color-text-muted); font-size: var(--text-base); max-width: 62ch; }
.lede + .lede { margin-top: var(--space-4); }
.lede a { color: var(--color-primary); font-weight: 600; text-decoration: underline; text-decoration-color: var(--color-primary-highlight); text-underline-offset: 2px; }
.lede a:hover { color: var(--color-primary-hover); }

/* ===== Summary bar ===== */
.summary-bar {
  position: sticky; top: var(--header-attr-h, 125px); z-index: 20;
  display: grid; grid-template-columns: auto auto 1fr; gap: var(--space-6);
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  margin-bottom: var(--space-8);
  box-shadow: var(--shadow-card);
}
.summary-item { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.summary-item--wide { border-left: 1px solid var(--color-divider); padding-left: var(--space-6); }
.summary-value { font-family: var(--font-display); font-weight: 700; font-size: var(--text-lg); color: var(--color-primary); white-space: nowrap; }
.summary-of { font-size: var(--text-xs); color: var(--color-text-faint); font-weight: 500; }
.summary-label { font-size: var(--text-xs); color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.06em; }
.summary-status { font-size: var(--text-sm); color: var(--color-text-muted); }
.summary-status.is-flagged { color: var(--color-warning); font-weight: 600; }
.summary-status.is-clear { color: var(--color-primary); font-weight: 600; }

/* ===== Question list ===== */
.quiz-list { display: flex; flex-direction: column; gap: var(--space-4); margin-bottom: var(--space-16); }
.q-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-5);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.q-card.is-answered { border-color: var(--color-border); }
.q-card:hover { box-shadow: var(--shadow-card); }
.q-main { display: flex; gap: var(--space-4); align-items: flex-start; flex: 1; min-width: 0; }
.q-num {
  flex-shrink: 0; width: 28px; height: 28px; border-radius: 50%;
  background: var(--color-surface-offset); color: var(--color-text-muted);
  display: grid; place-items: center; font-size: var(--text-xs); font-weight: 700;
  font-family: var(--font-display);
}
.q-card[data-group="I"] .q-num { background: var(--color-primary-highlight); color: var(--color-primary-active); }
.q-text { font-size: var(--text-base); color: var(--color-text); padding-top: 2px; }
.q-tag {
  display: inline-block; margin-left: var(--space-2); font-size: var(--text-xs);
  color: var(--color-primary); font-weight: 600; vertical-align: middle;
}
.q-toggle { display: flex; gap: var(--space-2); flex-shrink: 0; }
.q-toggle input { position: absolute; opacity: 0; pointer-events: none; }
.q-toggle label {
  min-width: 56px; text-align: center;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  font-size: var(--text-sm); font-weight: 600;
  color: var(--color-text-muted);
  cursor: pointer; user-select: none;
  transition: all var(--transition);
}
.q-toggle label:hover { border-color: var(--color-primary); color: var(--color-primary); }
.q-toggle input[value="yes"]:checked + label {
  background: var(--color-yes-bg); border-color: var(--color-yes-bg); color: var(--color-yes-text);
}
.q-toggle input[value="no"]:checked + label {
  background: var(--color-surface-offset); border-color: var(--color-border); color: var(--color-text);
}

/* ===== Results ===== */
.results {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  margin-bottom: var(--space-12);
}
.results h2 { font-size: var(--text-lg); font-weight: 700; margin-bottom: var(--space-6); }
.score-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-4); margin-bottom: var(--space-6); }
.score-card {
  background: var(--color-surface-2); border: 1px solid var(--color-divider);
  border-radius: var(--radius-md); padding: var(--space-4);
}
.score-card--total { background: var(--color-primary-highlight); border-color: var(--color-primary); }
.score-card-label { font-size: var(--text-xs); color: var(--color-text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; margin-bottom: var(--space-2); }
.score-card-sub { display: block; font-size: var(--text-xs); font-weight: 400; text-transform: none; color: var(--color-text-faint); margin-top: 2px; letter-spacing: 0; }
.score-card-value { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 700; color: var(--color-primary); margin-bottom: var(--space-1); }
.score-card--total .score-card-value { color: var(--color-primary-active); }
[data-theme="dark"] .score-card--total .score-card-value { color: var(--color-primary); }
.score-card-unit { font-size: var(--text-sm); font-weight: 500; color: var(--color-text-muted); }
.score-card-detail { font-size: var(--text-xs); color: var(--color-text-muted); }

.interpretation {
  border-radius: var(--radius-md);
  padding: var(--space-5);
  background: var(--color-surface-offset);
  border: 1px solid var(--color-divider);
  margin-bottom: var(--space-5);
  font-size: var(--text-base);
}
.interpretation.is-flagged { background: var(--color-warning-highlight); border-color: var(--color-warning); }
.interpretation.is-clear { background: var(--color-primary-highlight); border-color: var(--color-primary); }
.interpretation p { color: var(--color-text); }

.disclaimer { font-size: var(--text-xs); color: var(--color-text-muted); margin-bottom: var(--space-6); }

.actions { display: flex; gap: var(--space-3); flex-wrap: wrap; }
.btn {
  font-family: var(--font-body); font-weight: 600; font-size: var(--text-sm);
  padding: var(--space-3) var(--space-6); border-radius: var(--radius-sm);
  cursor: pointer; border: 1px solid transparent; transition: all var(--transition);
}
.btn-primary { background: var(--color-primary); color: var(--color-text-inverse); }
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-ghost { background: transparent; border-color: var(--color-border); color: var(--color-text-muted); }
.btn-ghost:hover { border-color: var(--color-text-muted); color: var(--color-text); }

.page-footer { padding-block: var(--space-8) var(--space-16); color: var(--color-text-faint); font-size: var(--text-xs); text-align: center; }

.book-promo { display: flex; flex-direction: column; align-items: center; gap: var(--space-2); margin-top: var(--space-6); }
.book-cover { width: 96px; height: auto; border-radius: var(--radius-sm); border: 1px solid var(--color-border); box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
.book-caption { font-size: var(--text-xs); color: var(--color-text-faint); }
.book-caption a { color: var(--color-primary); font-weight: 600; }

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .brand-mark-wordmark { height: 30px; }
  .brand-sub { font-size: 11px; }
  .q-card { flex-direction: column; align-items: stretch; gap: var(--space-4); }
  .q-toggle { align-self: flex-end; }
  .summary-bar { grid-template-columns: 1fr 1fr; row-gap: var(--space-3); }
  .summary-item--wide { border-left: none; padding-left: 0; grid-column: 1 / -1; border-top: 1px solid var(--color-divider); padding-top: var(--space-3); }
  .score-grid { grid-template-columns: 1fr; }
  .intro h1 { font-size: var(--text-xl); }
}

/* ===== Print ===== */
@media print {
  .site-header, .attribution-strip, .progress-bar, #print-btn, #reset-btn, .icon-btn { display: none !important; }
  body { background: #fff; color: #000; }
  .summary-bar, .q-card, .results { box-shadow: none; border: 1px solid #ccc; }
  .quiz-list { margin-bottom: var(--space-6); }
}