/* Lumen Academy — тёплая светлая витрина */
:root {
  --surface: #fbf6ee;
  --surface-raised: #fffdf8;
  --ink: #2a2118;
  --ink-soft: #6b5d4c;
  --amber: #e8a13c;
  --amber-deep: #d97b29;
  --teal: #2f5d50;
  --teal-soft: #e3ede8;
  --line: #eadfcd;
  --radius-lg: 22px;
  --radius-md: 14px;
  --shadow-soft: 0 10px 30px rgba(42, 33, 24, 0.09);
  --font-display: "Iowan Old Style", "Palatino", "Georgia", serif;
  --font-body: -apple-system, "Segoe UI", system-ui, sans-serif;
  --space-section: clamp(4rem, 3rem + 4vw, 7.5rem);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.95rem + 0.25vw, 1.0625rem);
  line-height: 1.6;
  color: var(--ink);
  background:
    radial-gradient(900px 500px at 85% -5%, rgba(232, 161, 60, 0.14), transparent 60%),
    var(--surface);
}
h1, h2, h3 { font-family: var(--font-display); line-height: 1.15; margin: 0 0 0.5em; }
h2 { font-size: clamp(1.75rem, 1.4rem + 1.6vw, 2.6rem); }
p { margin: 0 0 1em; }

/* --- Кнопки --- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 0.75rem 1.4rem; border-radius: 999px; border: 1px solid transparent;
  font: 600 0.95rem var(--font-body); cursor: pointer; text-decoration: none;
  color: var(--ink);
  transition: transform 200ms var(--ease-out), box-shadow 200ms var(--ease-out), background 200ms;
}
.btn:hover { transform: translateY(-2px); }
.btn:focus-visible { outline: 3px solid var(--amber); outline-offset: 2px; }
.btn-primary { background: var(--teal); color: #fdf9f0; box-shadow: 0 8px 20px rgba(47, 93, 80, 0.28); }
.btn-primary:hover { background: #27473d; }
.btn-ghost { border-color: var(--line); background: var(--surface-raised); }
.btn-ghost:hover { border-color: var(--amber); }
.btn-card { padding: 0.55rem 1.1rem; font-size: 0.875rem; background: var(--teal-soft); color: var(--teal); }
.btn-card:hover { background: var(--teal); color: #fdf9f0; }

/* --- Шапка --- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; gap: 1.5rem;
  padding: 0.8rem clamp(1rem, 4vw, 3rem);
  background: rgba(251, 246, 238, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.brand { display: inline-flex; align-items: center; gap: 0.6rem; text-decoration: none; color: var(--ink); }
.brand-name { font-family: var(--font-display); font-size: 1.3rem; font-weight: 700; }
.brand-name em { font-style: normal; color: var(--teal); font-weight: 400; }
.site-nav { display: flex; gap: 1.4rem; margin-left: auto; }
.site-nav a { color: var(--ink-soft); text-decoration: none; font-weight: 500; font-size: 0.95rem; }
.site-nav a:hover { color: var(--teal); }

/* --- Hero --- */
.hero {
  display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(2rem, 4vw, 4rem); align-items: center;
  max-width: 1160px; margin: 0 auto;
  padding: var(--space-section) clamp(1rem, 4vw, 3rem) var(--space-section);
}
.eyebrow {
  display: inline-block; padding: 0.3rem 0.9rem; border-radius: 999px;
  background: var(--teal-soft); color: var(--teal);
  font-size: 0.8rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
}
.hero h1 { font-size: clamp(2.4rem, 1.6rem + 3.6vw, 4.4rem); letter-spacing: -0.01em; }
.hero .accent { color: var(--amber-deep); font-style: italic; }
.hero-sub { max-width: 34rem; color: var(--ink-soft); font-size: 1.1rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.9rem; margin: 1.6rem 0 2.2rem; }
.hero-stats { display: flex; gap: clamp(1.2rem, 3vw, 2.6rem); margin: 0; }
.hero-stats dt { font: 700 1.7rem var(--font-display); color: var(--teal); }
.hero-stats dd { margin: 0; max-width: 11rem; color: var(--ink-soft); font-size: 0.85rem; }

.hero-visual { position: relative; min-height: 340px; }
.hero-glow {
  position: absolute; inset: 8% 4%;
  background: radial-gradient(circle at 40% 35%, rgba(232, 161, 60, 0.35), rgba(232, 161, 60, 0) 65%);
  border-radius: 50%;
}
.hero-card {
  position: absolute; background: var(--surface-raised);
  border: 1px solid var(--line); border-radius: var(--radius-md);
  box-shadow: var(--shadow-soft); padding: 1.1rem 1.3rem;
  display: grid; gap: 0.3rem;
}
.hero-card-main { top: 14%; left: 6%; right: 18%; animation: float 7s ease-in-out infinite; }
.hero-card-small { bottom: 12%; right: 2%; max-width: 200px; animation: float 7s 1.2s ease-in-out infinite; }
.hero-card strong { font-family: var(--font-display); font-size: 1.15rem; }
.hero-card-tag {
  justify-self: start; font-size: 0.7rem; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; color: #9a3b12; background: #fbe0d4;
  padding: 0.15rem 0.6rem; border-radius: 999px;
}
.hero-card-meta, .hero-card-small span { color: var(--ink-soft); font-size: 0.85rem; }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* --- Секции --- */
.courses, .teachers, .faq { max-width: 1160px; margin: 0 auto; padding: 0 clamp(1rem, 4vw, 3rem) var(--space-section); }
.section-sub { color: var(--ink-soft); max-width: 36rem; margin-bottom: 2.2rem; }

.course-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 1.2rem; }
.course-card {
  position: relative; display: grid; gap: 0.5rem; align-content: start;
  background: var(--surface-raised); border: 1px solid var(--line);
  border-radius: var(--radius-lg); padding: 1.6rem 1.5rem;
  transition: transform 250ms var(--ease-out), box-shadow 250ms var(--ease-out);
}
.course-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-soft); }
.course-card.is-featured { background: linear-gradient(160deg, #fff8ec, #fdeed6); border-color: #f0d5a6; }
.course-card h3 { font-size: 1.25rem; margin-bottom: 0; }
.course-card p { color: var(--ink-soft); font-size: 0.95rem; margin: 0; }
.course-tag {
  position: absolute; top: 1.1rem; right: 1.2rem; font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.08em; text-transform: uppercase; color: var(--amber-deep);
}
.course-meta { display: flex; gap: 1rem; margin: 0.4rem 0 0.8rem; font-weight: 600; font-size: 0.9rem; color: var(--teal); }
.course-meta span + span::before { content: "·"; margin-right: 1rem; color: var(--line); }
.btn-card { justify-self: start; }

.teacher-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.2rem; }
.teacher-card { background: var(--surface-raised); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 1.5rem; }
.teacher-avatar {
  width: 56px; height: 56px; border-radius: 50%; display: grid; place-items: center;
  background: var(--teal); color: #fdf9f0; font: 700 1.05rem var(--font-display);
  margin-bottom: 0.9rem;
}
.teacher-card h3 { font-size: 1.1rem; margin-bottom: 0.2em; }
.teacher-card p { color: var(--ink-soft); font-size: 0.9rem; margin: 0; }

.faq-list { display: grid; gap: 0.8rem; max-width: 760px; }
.faq details {
  background: var(--surface-raised); border: 1px solid var(--line);
  border-radius: var(--radius-md); padding: 1rem 1.3rem;
}
.faq summary { font-weight: 600; cursor: pointer; font-family: var(--font-display); font-size: 1.05rem; }
.faq details[open] { border-color: var(--amber); }
.faq details p { margin: 0.7rem 0 0.2rem; color: var(--ink-soft); }

.cta-band {
  max-width: 1160px; margin: 0 auto var(--space-section);
  padding: clamp(2.5rem, 5vw, 4rem);
  background: var(--teal); color: #fdf9f0; border-radius: var(--radius-lg);
  text-align: center;
  width: calc(100% - 2 * clamp(1rem, 4vw, 3rem));
}
.cta-band p { color: rgba(253, 249, 240, 0.8); max-width: 34rem; margin: 0 auto 1.6rem; }
.cta-band .btn-primary { background: var(--amber); color: var(--ink); box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25); }
.cta-band .btn-primary:hover { background: #f0b256; }

.site-footer {
  border-top: 1px solid var(--line); padding: 2rem clamp(1rem, 4vw, 3rem) 6.5rem;
  color: var(--ink-soft); font-size: 0.85rem;
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between;
}
.site-footer p { margin: 0; }

/* --- Адаптив --- */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; }
  .hero-visual { min-height: 260px; }
  .site-nav { display: none; }
}
@media (max-width: 480px) {
  .hero-stats { flex-wrap: wrap; }
  .hero-actions .btn { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  .hero-card { animation: none; }
  .btn, .course-card { transition: none; }
  html { scroll-behavior: auto; }
}