/* =========================
   AI-Mektep — Light Theme
   File: assets/styles.css
   ========================= */

:root{
  /* палитра */
  --bg: #f7f9fc;
  --bg-soft: #ffffff;
  --text: #0f172a;         /* slate-900 */
  --text-muted: #64748b;   /* slate-500 */
  --brand: #4f46e5;        /* indigo-600 */
  --brand-700: #4338ca;
  --accent: #16a34a;       /* green-600 */
  --accent-700: #15803d;
  --warning: #f59e0b;      /* amber-500 */
  --danger: #ef4444;       /* red-500 */
  --border: #e5e7eb;       /* gray-200 */
  --shadow: 0 10px 20px rgba(15,23,42,.05), 0 2px 6px rgba(15,23,42,.04);

  /* радиусы и размеры */
  --r: 14px;
  --r-lg: 18px;
  --pad: 22px;
  --gap: 18px;

  /* шрифты */
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
}

/* базовые */
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font: 16px/1.55 var(--font);
  color: var(--text);
  background: radial-gradient(1400px 600px at 50% -200px, #eaeffe 0, transparent 60%), var(--bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}

.container{max-width:1120px;margin:0 auto;padding:28px 20px}

/* topbar */
.topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:12px 6px;margin-bottom:20px;
}
.brand{display:flex;align-items:center;gap:12px}
.logo{
  width:42px;height:42px;border-radius:12px;
  background:linear-gradient(180deg,#6366f1,#4338ca);
  display:grid;place-items:center;color:#fff;font-size:22px;box-shadow:var(--shadow)
}
.nav{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.nav a{
  color:var(--text);padding:8px 10px;border-radius:10px;
}
.nav a:hover{background:#eef2ff;color:var(--brand)}

/* типографика */
h1{font-size:44px;line-height:1.1;margin:0 0 10px;font-weight:800;letter-spacing:-0.02em;color:#3b82f6}
h2{font-size:22px;margin:0 0 14px;font-weight:700}
h3{font-size:18px;margin:0 0 10px;font-weight:700}
h4{margin:0 0 8px;font-size:16px}
.muted{color:var(--text-muted)}
.status{color:var(--text-muted);margin-left:10px}

/* карточки и секции */
.card{
  background:var(--bg-soft);
  border:1px solid var(--border);
  border-radius:var(--r-lg);
  padding:var(--pad);
  margin:18px 0;
  box-shadow:var(--shadow);
}
.hero{
  padding:48px var(--pad);
  text-align:center;
  background:
    radial-gradient(600px 240px at 50% 0, #eef2ff 0, transparent 70%),
    var(--bg-soft);
}
.feat{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin:20px 0}
.pill{
  background:#ffffff;border:1px solid var(--border);
  padding:14px 16px;border-radius:14px;box-shadow:var(--shadow);
  font-weight:600;color:var(--text);
}

/* сетки */
.grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
@media (max-width:980px){ .grid{grid-template-columns:repeat(2,1fr)} .grid-2{grid-template-columns:1fr} }
@media (max-width:540px){ .grid{grid-template-columns:1fr} }

/* courses */
.course{
  display:block;background:#fff;border:1px solid var(--border);border-radius:16px;overflow:hidden;
  transition:transform .12s ease, box-shadow .12s ease;box-shadow:var(--shadow)
}
.course:hover{transform:translateY(-4px)}
.cover{height:120px;background:#eef2ff;border-bottom:1px solid var(--border)}
.cover.xl{height:220px;border-radius:16px}
.title{padding:12px 14px 0;font-weight:700}
.course .muted{padding:0 14px 14px}

/* формы */
label{display:block;font-weight:600;margin:8px 0}
input[type=text],input[type=email],input[type=password],input[type=number],select,textarea{
  width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:12px;background:#fff;
  outline:none;transition:border .12s ease, box-shadow .12s ease;
}
input:focus,select:focus,textarea:focus{border-color:#c7d2fe;box-shadow:0 0 0 4px #e0e7ff}
details{border:1px dashed var(--border);padding:10px 12px;border-radius:12px;background:#fbfbff}
.params{display:grid;grid-template-columns:repeat(4, minmax(0,1fr));gap:12px;margin-top:12px}
@media (max-width:900px){ .params{grid-template-columns:repeat(2,1fr)} }
@media (max-width:560px){ .params{grid-template-columns:1fr} }
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:12px}
.hidden{display:none}

/* кнопки */
.btn{
  display:inline-block;border:1px solid #c7d2fe;background:#4f46e5;color:#fff;
  padding:10px 16px;border-radius:12px;font-weight:700;box-shadow:var(--shadow);
  transition:transform .12s ease, background .12s ease, box-shadow .12s ease;cursor:pointer
}
.btn:hover{background:#4338ca;text-decoration:none;transform:translateY(-1px)}
.btn.secondary{background:#ffffff;color:var(--brand);border-color:#dbe3ff}
.btn.secondary:hover{background:#eef2ff}
.btn.success{background:var(--accent);border-color:#a7f3d0}
.btn.success:hover{background:var(--accent-700)}
.btn.warn{background:var(--warning);border-color:#fde68a}
.btn.danger{background:var(--danger);border-color:#fecaca}
.actions{display:flex;gap:12px;flex-wrap:wrap;align-items:center}

/* блоки результатов / Q&A */
.res-block{background:#fff;border:1px solid var(--border);border-radius:14px;padding:14px;margin-bottom:12px}
.q{background:#fafafa;border:1px solid var(--border);border-radius:12px;padding:12px;margin:10px 0}
.cap{font-weight:700;margin-bottom:6px}
.ans{white-space:pre-wrap}
.expl{margin-top:8px;background:#f8fafc;border-left:3px solid #cbd5e1;padding:10px;border-radius:8px}
.code{font-family:ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;background:#f1f5f9;border:1px solid #e2e8f0;border-radius:6px;padding:1px 6px}

/* статусы/бейджи */
.alert{padding:10px 12px;border-radius:10px;border:1px solid var(--border);background:#fff8f0}
.alert.error{background:#fff1f2;border-color:#fecaca;color:#991b1b}
.badge{
  display:inline-block;padding:4px 10px;border-radius:999px;font-weight:700;font-size:12px;
  background:#eef2ff;color:#3730a3;border:1px solid #c7d2fe
}
.badge.multi{background:#ecfeff;color:#155e75;border-color:#bae6fd}
.badge.match{background:#fef9c3;color:#854d0e;border-color:#fde68a}
.badge.single{background:#e9ffe8;color:#166534;border-color:#bbf7d0}

/* таблицы */
table{width:100%;border-collapse:collapse;border:1px solid var(--border);background:#fff;border-radius:12px;overflow:hidden}
th,td{padding:10px 12px;border-bottom:1px solid var(--border);text-align:left}
thead th{background:#f8fafc}

/* квиз */
.quiz-q{border:1px solid var(--border);background:#fff;border-radius:12px;padding:12px;margin:10px 0}
.quiz-answers label{display:block;background:#fafbff;border:1px solid #e6e9fc;border-radius:10px;padding:8px 10px;margin:8px 0;cursor:pointer}
.quiz-q.correct{border-color:#bbf7d0;background:#f0fdf4}
.quiz-q.incorrect{border-color:#fecaca;background:#fff1f2}

/* утилити */
pre{margin:0;font-family:ui-monospace, Menlo, Consolas, monospace;background:#f8fafc;border:1px solid var(--border);border-radius:10px;padding:10px}