:root{
  --bg:#f4f6fb; --card:#ffffff; --ink:#1a2236; --muted:#5c6784;
  --line:#e6e9f2; --brand:#4f7cff; --brand2:#7b5cff; --accent:#ff5c8a;
  --shadow:0 6px 24px rgba(28,40,80,.08); --shadow-lg:0 14px 40px rgba(28,40,80,.14);
  --radius:20px; --gold:#f2c200;
}
[data-theme="dark"]{
  --bg:#0f1424; --card:#171d33; --ink:#eef1fb; --muted:#9aa5c4;
  --line:#26304d; --shadow:0 6px 24px rgba(0,0,0,.35); --shadow-lg:0 16px 44px rgba(0,0,0,.5);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Heebo',system-ui,Arial,sans-serif;background:var(--bg);color:var(--ink);
  line-height:1.6;-webkit-font-smoothing:antialiased;min-height:100vh;
  transition:background .3s,color .3s;
}
.container{max-width:960px;margin:0 auto;padding:0 16px}
a{color:inherit;text-decoration:none}

/* Header */
header.site{position:sticky;top:0;z-index:50;background:var(--card);border-bottom:1px solid var(--line);backdrop-filter:blur(8px)}
header .bar{display:flex;align-items:center;justify-content:space-between;height:60px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem}
.logo .mark{width:36px;height:36px;border-radius:12px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-size:1.2rem;box-shadow:var(--shadow)}
.head-actions{display:flex;gap:8px}
.icon-btn{width:40px;height:40px;border-radius:12px;border:1px solid var(--line);background:var(--card);
  color:var(--ink);font-size:1.15rem;cursor:pointer;display:grid;place-items:center;transition:.2s}
.icon-btn:hover{background:var(--bg);transform:translateY(-1px)}

/* Hero */
.hero{text-align:center;padding:32px 0 8px}
.hero h1{font-size:2rem;font-weight:800;line-height:1.25;margin-bottom:8px}
.hero p{color:var(--muted);max-width:560px;margin:0 auto 18px;font-size:1.05rem}

/* Daily fact card */
.daily{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow-lg);position:relative;overflow:hidden;margin:8px 0 22px}
.daily::after{content:"";position:absolute;inset:auto -40px -60px auto;width:220px;height:220px;
  background:rgba(255,255,255,.12);border-radius:50%}
.daily .tag{font-size:.8rem;font-weight:700;opacity:.9;letter-spacing:.5px;display:inline-flex;align-items:center;gap:6px}
.daily .fact{font-size:1.25rem;font-weight:700;margin:10px 0 6px;position:relative;z-index:1}
.daily .src{opacity:.92;font-size:.95rem;position:relative;z-index:1}
.daily .row{display:flex;gap:8px;margin-top:16px;position:relative;z-index:1;flex-wrap:wrap}
.daily .row button{border:0;background:rgba(255,255,255,.2);color:#fff;padding:9px 16px;border-radius:12px;
  font-family:inherit;font-weight:700;cursor:pointer;font-size:.92rem;transition:.2s;display:inline-flex;align-items:center;gap:6px}
.daily .row button:hover{background:rgba(255,255,255,.32)}

/* Search */
.search{margin:6px 0 20px}
.search input{width:100%;padding:14px 18px;border-radius:16px;border:1px solid var(--line);
  background:var(--card);color:var(--ink);font-family:inherit;font-size:1rem;box-shadow:var(--shadow)}
.search input:focus{outline:2px solid var(--brand);border-color:transparent}

/* Category chips */
.chips{display:flex;gap:8px;overflow-x:auto;padding:4px 0 14px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}
.chip{flex:0 0 auto;padding:8px 14px;border-radius:999px;border:1px solid var(--line);background:var(--card);
  color:var(--ink);font-family:inherit;font-weight:600;cursor:pointer;font-size:.9rem;white-space:nowrap;transition:.2s;display:flex;align-items:center;gap:6px}
.chip:hover{transform:translateY(-1px);box-shadow:var(--shadow)}
.chip.active{background:var(--brand);border-color:var(--brand);color:#fff}

/* Section title */
.section-head{display:flex;align-items:center;justify-content:space-between;margin:18px 0 12px}
.section-head h2{font-size:1.3rem;font-weight:800}
.count{color:var(--muted);font-size:.9rem}

/* Fact cards grid */
.grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;padding-bottom:30px}
@media(max-width:640px){.grid{grid-template-columns:1fr}.hero h1{font-size:1.6rem}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;
  box-shadow:var(--shadow);position:relative;transition:.2s;display:flex;flex-direction:column}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.card .cat{display:inline-flex;align-items:center;gap:6px;font-size:.78rem;font-weight:700;
  padding:4px 10px;border-radius:999px;align-self:flex-start;margin-bottom:10px}
.card .txt{font-size:1.02rem;font-weight:500}
.card .proverb{font-size:1.12rem;font-weight:800;line-height:1.4;margin-bottom:8px;
  padding-right:12px;border-right:3px solid var(--gold)}
.card .meaning{font-size:.96rem;font-weight:500;color:var(--muted)}
.card .meaning .mlabel{font-weight:700;color:var(--ink)}
.card .actions{display:flex;gap:6px;margin-top:14px;padding-top:12px;border-top:1px solid var(--line)}
.card .actions button{flex:0 0 auto;width:38px;height:38px;border-radius:11px;border:1px solid var(--line);
  background:var(--card);color:var(--muted);cursor:pointer;font-size:1.05rem;transition:.2s;display:grid;place-items:center}
.card .actions button:hover{background:var(--bg);color:var(--ink)}
.card .actions button.on{color:var(--accent);border-color:var(--accent)}
.card .actions .spacer{flex:1}

/* Empty state */
.empty{text-align:center;padding:50px 20px;color:var(--muted)}
.empty .big{font-size:3rem;margin-bottom:8px}

/* Quiz */
.quiz-wrap{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);margin-bottom:30px}
.quiz-q{font-size:1.15rem;font-weight:700;margin-bottom:18px}
.quiz-opts{display:flex;flex-direction:column;gap:10px}
.quiz-opt{padding:13px 16px;border-radius:14px;border:1px solid var(--line);background:var(--bg);
  color:var(--ink);font-family:inherit;font-weight:600;cursor:pointer;text-align:right;transition:.2s;font-size:.98rem}
.quiz-opt:hover{border-color:var(--brand)}
.quiz-opt.correct{background:#e4f7ee;border-color:#22b07d;color:#0d7a4f}
.quiz-opt.wrong{background:#fdeaea;border-color:#e05555;color:#a12727}
[data-theme="dark"] .quiz-opt.correct{background:#13342a;color:#5fe0a8}
[data-theme="dark"] .quiz-opt.wrong{background:#3a1f1f;color:#ff9b9b}
.quiz-foot{display:flex;align-items:center;justify-content:space-between;margin-top:18px;gap:10px;flex-wrap:wrap}
.quiz-score{font-weight:700}
.btn{border:0;background:var(--brand);color:#fff;padding:11px 20px;border-radius:13px;font-family:inherit;
  font-weight:700;cursor:pointer;font-size:.95rem;transition:.2s}
.btn:hover{background:var(--brand2)}
.btn.ghost{background:var(--card);color:var(--ink);border:1px solid var(--line)}

/* Tabs */
.tabs{display:flex;gap:6px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:5px;margin:6px 0 18px}
.tabs button{flex:1;padding:10px;border:0;background:transparent;color:var(--muted);font-family:inherit;
  font-weight:700;cursor:pointer;border-radius:10px;transition:.2s;font-size:.95rem}
.tabs button.active{background:var(--brand);color:#fff}

/* Toast */
.toast{position:fixed;bottom:20px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--ink);
  color:var(--bg);padding:12px 22px;border-radius:14px;font-weight:600;box-shadow:var(--shadow-lg);
  opacity:0;pointer-events:none;transition:.3s;z-index:100}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

footer{text-align:center;color:var(--muted);padding:30px 16px 40px;font-size:.9rem;border-top:1px solid var(--line);margin-top:20px}
footer a{color:var(--brand);font-weight:600}