:root {
  --bg: #0a1831;
  --bg2: #0f2647;
  --card: rgba(21, 38, 66, 0.96);
  --card-soft: rgba(34, 55, 89, 0.86);
  --gold: #ffd45f;
  --gold-dark: #e3b83f;
  --blue: #76ddff;
  --text: #eef4ff;
  --muted: #c2d1ea;
  --border: rgba(255, 212, 95, 0.18);
  --shadow: 0 20px 40px rgba(0, 0, 0, 0.28);
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: 'Inter', system-ui, sans-serif;
  background: radial-gradient(circle at top, #153460 0%, var(--bg) 45%, #071224 100%);
  color: var(--text);
}
.page-shell {
  width: min(1200px, calc(100% - 32px));
  margin: 28px auto 40px;
}
.card {
  background: linear-gradient(180deg, rgba(27, 46, 77, 0.95), rgba(19, 34, 60, 0.98));
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow);
}
.hero {
  text-align: center;
  padding: 34px 28px;
  margin-bottom: 22px;
}
.hero-badge {
  display: inline-block;
  border: 1px solid rgba(255, 212, 95, 0.35);
  color: var(--gold);
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 700;
  margin-bottom: 18px;
  background: rgba(255, 212, 95, 0.08);
}
.hero h1 {
  font-size: clamp(2rem, 4vw, 4rem);
  line-height: 1.1;
  color: var(--gold);
  margin: 0 0 16px;
}
.hero h1 span { color: #fff3b2; }
.hero p {
  max-width: 920px;
  margin: 0 auto;
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--muted);
}
.hero-pills, .section-tabs {
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: center;
}
.hero-pills { margin-top: 22px; }
.hero-pills span, .tab-btn {
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid rgba(118, 221, 255, 0.2);
  background: rgba(29, 69, 114, 0.52);
  color: var(--text);
  font-weight: 700;
}
.controls-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-bottom: 22px;
}
.panel { padding: 22px; }
.panel h2, .section-tabs-wrap h2 { margin: 0 0 12px; color: var(--gold); font-size: 1.9rem; }
.panel p, .course-card p, .pattern-card p, .sentence-card p, .word-card p { color: var(--muted); line-height: 1.55; }
input, select, textarea {
  width: 100%;
  border: 0;
  outline: none;
  margin-top: 12px;
  border-radius: 14px;
  padding: 15px 16px;
  font-size: 1rem;
  color: #112;
  background: #f2f4f7;
}
textarea { resize: vertical; min-height: 96px; }
.select-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.results-box {
  margin-top: 14px;
  min-height: 64px;
  padding: 14px 16px;
  border-radius: 14px;
  background: rgba(87, 113, 150, 0.16);
  color: var(--muted);
}
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.btn {
  border: 0;
  padding: 13px 18px;
  border-radius: 14px;
  font-size: 1rem;
  font-weight: 800;
  cursor: pointer;
}
.btn-gold { background: var(--gold); color: #15274a; }
.btn-blue { background: var(--blue); color: #10263f; }
.btn-red { background: #ff7b7b; color: #fff; }
.section-tabs-wrap { padding: 20px; }
.tab-btn { cursor: pointer; }
.tab-btn.active { background: var(--gold); color: #182846; border-color: transparent; }
.tab-content { display: none; padding-top: 20px; }
.tab-content.active { display: block; }
.course-grid, .pattern-grid, .word-bank-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.course-card, .pattern-card, .word-card, .sentence-card, .quiz-box {
  background: var(--card-soft);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 20px;
  padding: 18px;
}
.course-card h3, .pattern-card h3, .word-card h3, .sentence-card h3 { margin: 0 0 10px; font-size: 1.4rem; }
.tag {
  display: inline-block;
  padding: 7px 11px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 700;
  margin: 4px 6px 8px 0;
  background: rgba(118, 221, 255, 0.16);
  color: var(--blue);
}
.ipa {
  display: inline-block;
  margin: 6px 0 10px;
  font-weight: 700;
  color: #fff7c5;
}
.sentence-list { display: grid; gap: 14px; }
.sentence-card { display: flex; flex-direction: column; gap: 6px; }
.word-card .actions, .sentence-card .actions, .pattern-card .actions { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 10px; }
.small-btn {
  border: 0;
  cursor: pointer;
  border-radius: 12px;
  padding: 10px 14px;
  font-weight: 800;
  font-size: 0.95rem;
}
.small-btn.word { background: var(--gold); color: #172643; }
.small-btn.example { background: var(--blue); color: #10263f; }
.meta-line { color: #cfe0ff; font-size: 0.95rem; margin-top: 8px; }
.quiz-option {
  display: block;
  width: 100%;
  text-align: left;
  margin: 8px 0;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.08);
  background: rgba(255,255,255,.06);
  color: white;
  cursor: pointer;
}
.quiz-option.correct { background: rgba(51, 201, 124, 0.3); }
.quiz-option.wrong { background: rgba(255, 96, 96, 0.3); }
.quiz-status { margin-top: 12px; color: #fff3b2; font-weight: 700; }
.footer-note { color: var(--muted); margin-top: 8px; }
@media (max-width: 980px) {
  .controls-grid, .course-grid, .pattern-grid, .word-bank-grid { grid-template-columns: 1fr; }
}