:root {
  --bg: #f3eee4;
  --bg-2: #e7efe9;
  --paper: #fffdf8;
  --ink: #1a2421;
  --muted: #5c6b66;
  --line: #d9d0c3;
  --teal: #0d5c56;
  --teal-2: #148078;
  --gold: #b8892d;
  --coral: #c45c38;
  --ok: #1b7a4a;
  --bad: #b42318;
  --shadow: 0 18px 40px rgba(26, 36, 33, 0.08);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: Outfit, "Segoe UI", sans-serif;
  background:
    radial-gradient(900px 420px at 8% -10%, #dceee8 0%, transparent 55%),
    radial-gradient(700px 380px at 100% 0%, #f3e2cf 0%, transparent 50%),
    var(--bg);
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
}
.skip:focus {
  left: 12px;
  top: 12px;
  background: #fff;
  padding: 8px 12px;
  z-index: 20;
}

.top {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 22px;
  background: rgba(243, 238, 228, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: inherit;
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--teal);
  color: #f7f3ea;
  font-family: Fraunces, Georgia, serif;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-size: 1.05rem; }
.brand-text em {
  font-style: normal;
  color: var(--muted);
  font-size: 0.78rem;
}

.nav { display: flex; flex-wrap: wrap; gap: 6px; }
.nav a {
  color: var(--ink);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 999px;
  font-weight: 500;
  font-size: 0.92rem;
}
.nav a:hover, .nav a.active { background: #fff; }

#app { max-width: 1100px; margin: 0 auto; padding: 28px 20px 64px; }

.hero {
  display: grid;
  grid-template-columns: 1.3fr 0.9fr;
  gap: 28px;
  align-items: start;
  margin-bottom: 28px;
}
.hero h1 {
  font-family: Fraunces, Georgia, serif;
  font-size: clamp(2rem, 4vw, 3.1rem);
  font-weight: 650;
  line-height: 1.12;
  margin: 0 0 12px;
}
.hero p { color: var(--muted); font-size: 1.05rem; line-height: 1.55; margin: 0 0 18px; }
.kicker {
  display: inline-block;
  margin-bottom: 10px;
  color: var(--teal);
  font-weight: 650;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.75rem;
}

.actions { display: flex; flex-wrap: wrap; gap: 10px; }
.btn {
  appearance: none;
  border: 0;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: 12px;
  font: inherit;
  font-weight: 650;
  color: #fff;
  background: var(--teal);
}
.btn.secondary { background: #fff; color: var(--ink); border: 1px solid var(--line); }
.btn.ghost { background: transparent; color: var(--teal); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

.panel, .card, .stat {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: var(--shadow);
}
.stat-grid, .mode-grid, .q-grid, .gloss-grid {
  display: grid;
  gap: 14px;
}
.stat-grid { grid-template-columns: repeat(3, 1fr); }
.mode-grid { grid-template-columns: repeat(2, 1fr); }
.q-grid { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.gloss-grid { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }

.stat, .card, .mode { padding: 18px; }
.stat b { display: block; font-size: 1.7rem; font-family: Fraunces, Georgia, serif; }
.stat span, .muted { color: var(--muted); }

.mode h2, .card h3, .panel h2 {
  font-family: Fraunces, Georgia, serif;
  margin: 0 0 8px;
}
.mode p, .card p { margin: 0; color: var(--muted); line-height: 1.45; }
.mode { text-decoration: none; color: inherit; display: block; }
.mode:hover { transform: translateY(-2px); transition: 0.15s ease; }

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin: 8px 0 18px;
}
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip, .pill {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 999px;
  padding: 7px 12px;
  font: inherit;
  cursor: pointer;
}
.chip.on, .pill { font-weight: 650; }
.search {
  flex: 1;
  min-width: 180px;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--line);
  font: inherit;
  background: #fff;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 650;
  color: #fff;
}
.diff { background: #ece6da; color: var(--ink); }

.q-card h3 {
  font-family: Outfit, sans-serif;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
}
.q-card .es-preview { margin-top: 8px; font-size: 0.92rem; }

.bilingual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.lang-col {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
}
.lang-col h2 {
  margin: 0 0 12px;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal);
}
.stem {
  font-family: Fraunces, Georgia, serif;
  font-size: 1.25rem;
  line-height: 1.35;
  margin: 0 0 16px;
}
.options { display: grid; gap: 8px; }
.opt {
  width: 100%;
  text-align: left;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 12px;
  padding: 12px 14px;
  font: inherit;
  cursor: pointer;
}
.opt b { margin-right: 8px; }
.opt.correct { border-color: var(--ok); background: #e8f6ee; }
.opt.wrong { border-color: var(--bad); background: #fdecea; }
.opt.idle { cursor: default; }

.explain {
  margin-top: 18px;
  padding: 16px;
  border-radius: 16px;
  background: #f7f1e6;
  border: 1px solid var(--line);
}
.explain h3 { margin: 0 0 8px; font-family: Fraunces, Georgia, serif; }
.key {
  margin-top: 12px;
  padding: 10px 12px;
  border-left: 4px solid var(--gold);
  background: #fff;
}

.progress-bar {
  height: 8px;
  background: #e4ddd2;
  border-radius: 99px;
  overflow: hidden;
  margin: 10px 0 18px;
}
.progress-bar span {
  display: block;
  height: 100%;
  background: var(--teal);
}

.result { padding: 22px; }
.result h1 { font-family: Fraunces, Georgia, serif; }

.trap, .gloss {
  padding: 16px;
}
.trap h3, .gloss h3 { margin: 0 0 6px; }
.term { font-family: Fraunces, Georgia, serif; }

.note {
  font-size: 0.92rem;
  color: var(--muted);
}
mark {
  background: #f6e2b3;
  color: inherit;
  padding: 0 0.18em;
  border-radius: 4px;
}
table { font-size: 0.92rem; }
table td { border-bottom: 1px solid var(--line); vertical-align: top; }

.foot {
  padding: 24px 20px 40px;
  text-align: center;
  color: var(--muted);
  font-size: 0.88rem;
}
.foot p { margin: 4px 0; }

@media (max-width: 860px) {
  .hero, .bilingual, .stat-grid, .mode-grid { grid-template-columns: 1fr; }
  .top { flex-direction: column; align-items: flex-start; }
}