:root {
  --bg: #f4f7ee;
  --surface: #ffffff;
  --surface-soft: #f9fbf5;
  --ink: #172113;
  --muted: #66735f;
  --line: #dfe8d7;
  --brand: #2d6b35;
  --brand-dark: #1b4e26;
  --brand-soft: #e7f5df;
  --accent: #f6b733;
  --danger: #b4232c;
  --danger-soft: #fff0f1;
  --shadow: 0 20px 55px rgba(37, 64, 27, .10);
  --radius: 22px;
}

* { box-sizing: border-box; }
html { min-height: 100%; }
body {
  margin: 0;
  min-height: 100%;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at 10% 0%, #fff8df 0, rgba(255,248,223,0) 28%), linear-gradient(180deg, #fbfdf7 0%, var(--bg) 100%);
  color: var(--ink);
  line-height: 1.5;
}
a { color: var(--brand-dark); text-decoration: none; }
a:hover { text-decoration: underline; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px clamp(16px, 4vw, 44px);
  background: rgba(255,255,255,.86);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(223,232,215,.8);
}
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-weight: 900; letter-spacing: -.02em; }
.brand:hover { text-decoration: none; }
.brand-mark { display: grid; place-items: center; width: 42px; height: 42px; background: var(--brand-soft); border: 1px solid var(--line); border-radius: 14px; }
.brand-text { font-size: 20px; }
.main-nav, .auth-nav { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.main-nav a { padding: 10px 12px; border-radius: 12px; color: #25351f; font-weight: 700; }
.main-nav a:hover { background: var(--brand-soft); text-decoration: none; }
.hello { color: var(--muted); font-size: 14px; }

.site-main { max-width: 1220px; margin: 0 auto; padding: 34px clamp(14px, 4vw, 32px) 52px; }
.site-footer { max-width: 1220px; margin: 0 auto; padding: 26px clamp(14px, 4vw, 32px) 42px; color: var(--muted); display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap; }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 42px; padding: 10px 15px; border-radius: 14px; border: 1px solid var(--line); font: inherit; font-weight: 800; cursor: pointer; background: var(--surface); color: var(--ink); }
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn-light { background: #fff; color: var(--ink); }
.btn-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn-big { min-height: 52px; padding: 14px 20px; border-radius: 16px; }

.hero { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(260px, .6fr); gap: 28px; align-items: stretch; margin: 18px 0 44px; }
.hero-copy, .hero-card, .panel, .quiz-card, .sidebar-card, .empty-state, .timer-card { background: rgba(255,255,255,.94); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.hero-copy { padding: clamp(28px, 5vw, 56px); }
.eyebrow { display: inline-flex; padding: 8px 12px; border-radius: 999px; background: var(--brand-soft); color: var(--brand-dark); font-weight: 900; margin-bottom: 16px; }
h1 { font-size: clamp(34px, 6vw, 66px); line-height: .98; letter-spacing: -.055em; margin: 0 0 18px; }
h2 { font-size: clamp(24px, 3vw, 34px); letter-spacing: -.035em; margin: 0 0 10px; }
h3 { margin: 0 0 8px; font-size: 19px; letter-spacing: -.02em; }
.hero-copy p { color: var(--muted); font-size: 18px; max-width: 780px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.hero-card { padding: 26px; display: flex; flex-direction: column; justify-content: center; }
.gorilla { font-size: 82px; line-height: 1; margin-bottom: 16px; }
.hero-card p { color: var(--muted); }
.mini-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-top: 18px; }
.mini-stats span { border: 1px solid var(--line); border-radius: 16px; padding: 12px; background: var(--surface-soft); color: var(--muted); }
.mini-stats b { display: block; font-size: 24px; color: var(--ink); }

.section-head, .page-title-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin: 26px 0 18px; }
.section-head p, .page-title-row p { color: var(--muted); margin: 0; }
.link-arrow { font-weight: 900; }

.quiz-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.quiz-list { display: grid; gap: 14px; }
.quiz-list.compact .quiz-card { padding: 18px; }
.quiz-card { padding: 22px; }
.quiz-card-top { display: flex; align-items: start; justify-content: space-between; gap: 12px; }
.quiz-card h3 a { color: var(--ink); }
.quiz-card p { color: var(--muted); }
.meta-row { display: flex; gap: 10px; flex-wrap: wrap; color: var(--muted); font-size: 14px; }
.keywords { display: inline-flex; margin-top: 12px; padding: 8px 10px; border-radius: 999px; background: var(--surface-soft); border: 1px solid var(--line); color: var(--muted); font-size: 13px; }
.card-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.score-badge { flex: 0 0 auto; padding: 6px 10px; border-radius: 999px; background: #fff4d7; color: #7a5205; border: 1px solid #f2d58b; font-weight: 900; font-size: 13px; }

.features-grid, .stats-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; margin-top: 28px; }
.features-grid article, .stats-grid article { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.features-grid p { color: var(--muted); margin-bottom: 0; }
.stats-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.stats-grid span { color: var(--muted); }
.stats-grid b { display: block; font-size: 34px; }

.search-bar { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 10px; margin-bottom: 18px; }
input, textarea, select { width: 100%; border: 1px solid var(--line); border-radius: 14px; padding: 12px 13px; font: inherit; background: #fff; color: var(--ink); }
textarea { resize: vertical; }
label { display: grid; gap: 7px; font-weight: 800; }
legend { font-weight: 900; }
.two-column { display: grid; grid-template-columns: 280px minmax(0, 1fr); gap: 18px; align-items: start; }
.sidebar-card, .panel { padding: 22px; }
.sidebar-card { position: sticky; top: 92px; }
.category-pill { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 14px; background: #fff; margin-bottom: 8px; color: var(--ink); font-weight: 800; }
.category-pill.active, .category-pill:hover { background: var(--brand-soft); border-color: #b7dba6; text-decoration: none; }
.result-summary { margin-bottom: 14px; color: var(--muted); }

.empty-state { padding: 28px; text-align: center; }
.empty-state p, .muted { color: var(--muted); }
.flash { margin: 0 0 16px; padding: 13px 15px; border-radius: 14px; border: 1px solid var(--line); background: #fff; }
.flash-success { background: var(--brand-soft); border-color: #b7dba6; color: var(--brand-dark); }
.flash-warning { background: #fff8dd; border-color: #efd68a; color: #6d4a00; }
.flash-error { background: var(--danger-soft); border-color: #f0a0a7; color: var(--danger); }

.narrow { max-width: 560px; margin: 0 auto; }
.wide { max-width: 980px; }
.form-stack { display: grid; gap: 16px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.checkbox-grid { border: 1px solid var(--line); border-radius: 16px; padding: 16px; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.checkbox-grid legend { padding: 0 8px; }
.checkbox-grid label, .inline-check { display: flex; align-items: center; gap: 8px; font-weight: 700; }
.checkbox-grid input, .inline-check input { width: auto; }
.tabs { display: flex; gap: 8px; flex-wrap: wrap; margin: 0 0 18px; }
.tabs a, .tabs button { border: 1px solid var(--line); background: #fff; border-radius: 14px; padding: 10px 14px; font: inherit; font-weight: 900; color: var(--ink); cursor: pointer; }
.tabs a.active, .tabs button.active { background: var(--brand); color: #fff; border-color: var(--brand); text-decoration: none; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }
.simple-list { display: grid; gap: 10px; }
.simple-list article { padding: 16px; border: 1px solid var(--line); border-radius: 16px; background: #fff; }
.small-list article { padding: 12px; }

.test-layout { display: grid; grid-template-columns: 350px minmax(0, 1fr); gap: 18px; align-items: start; }
.test-sidebar { position: sticky; top: 86px; max-height: calc(100vh - 110px); overflow: auto; padding: 20px; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.test-sidebar h1 { font-size: 30px; line-height: 1.08; letter-spacing: -.04em; }
.back-link { font-weight: 900; display: inline-block; margin-bottom: 14px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0; }
.tag { padding: 7px 10px; border-radius: 999px; background: var(--brand-soft); color: var(--brand-dark); border: 1px solid #b7dba6; font-weight: 800; font-size: 13px; }
.timer-card { box-shadow: none; padding: 16px; margin: 18px 0; }
.label { color: var(--muted); font-weight: 900; text-transform: uppercase; font-size: 12px; letter-spacing: .08em; }
.timer-display { font-variant-numeric: tabular-nums; font-size: 38px; font-weight: 950; letter-spacing: -.04em; margin: 8px 0 12px; }
.timer-actions, .side-actions { display: grid; gap: 8px; }
.status-box { min-height: 0; margin-top: 14px; border-radius: 14px; font-weight: 800; }
.status-box:not(:empty) { padding: 12px; border: 1px solid var(--line); background: var(--surface-soft); }
.status-box.success { background: var(--brand-soft); color: var(--brand-dark); border-color: #b7dba6; }
.status-box.error { background: var(--danger-soft); color: var(--danger); border-color: #f0a0a7; }
.status-box.info { background: #eef6ff; color: #1f4d7a; border-color: #c6ddf6; }
.test-frame-wrap { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.test-frame { width: 100%; min-height: calc(100vh - 130px); border: 0; display: block; background: #fff; }

@media (max-width: 980px) {
  .site-header { align-items: flex-start; flex-direction: column; }
  .hero, .two-column, .test-layout { grid-template-columns: 1fr; }
  .sidebar-card, .test-sidebar { position: static; max-height: none; }
  .quiz-grid, .features-grid, .stats-grid { grid-template-columns: 1fr; }
  .search-bar, .form-grid { grid-template-columns: 1fr; }
  .checkbox-grid { grid-template-columns: 1fr; }
}