/* ============================================================
   VIBE CODING SCHOOL — премиум тёмно-фиолетовая дизайн-система
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Sora:wght@400;500;600;700;800&family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  /* Фоны */
  --bg-0: #07040f;
  --bg-1: #0c0718;
  --bg-2: #120a22;

  /* Стекло / поверхности */
  --glass: rgba(255, 255, 255, 0.035);
  --glass-strong: rgba(255, 255, 255, 0.06);
  --glass-border: rgba(168, 130, 255, 0.16);
  --glass-border-hover: rgba(168, 130, 255, 0.40);

  /* Акценты */
  --violet: #a855f7;
  --violet-bright: #c084fc;
  --indigo: #6366f1;
  --pink: #ec4899;
  --cyan: #22d3ee;
  --accent-grad: linear-gradient(135deg, #c084fc 0%, #8b5cf6 40%, #6366f1 100%);
  --accent-grad-soft: linear-gradient(135deg, rgba(192,132,252,0.18), rgba(99,102,241,0.12));

  /* Текст */
  --text: #ece8f7;
  --text-soft: #b9b2d4;
  --text-mute: #837ca0;

  /* Прочее */
  --radius: 22px;
  --radius-sm: 14px;
  --maxw: 1180px;
  --glow: 0 0 60px rgba(139, 92, 246, 0.25);
  --shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.7);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 90px; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg-0);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  position: relative;
}

/* Фоновое свечение */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 600px at 12% -5%, rgba(139, 92, 246, 0.22), transparent 60%),
    radial-gradient(800px 600px at 92% 8%, rgba(99, 102, 241, 0.16), transparent 55%),
    radial-gradient(900px 700px at 50% 110%, rgba(236, 72, 153, 0.10), transparent 60%);
}
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image: radial-gradient(rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse 100% 80% at 50% 0%, black, transparent 75%);
}

h1, h2, h3, h4 { font-family: 'Sora', sans-serif; line-height: 1.15; letter-spacing: -0.02em; font-weight: 700; }
a { color: inherit; text-decoration: none; }
.mono { font-family: 'JetBrains Mono', monospace; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; position: relative; }
.section-sm { padding: 60px 0; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--violet-bright);
  padding: 7px 14px; border-radius: 100px;
  background: var(--accent-grad-soft);
  border: 1px solid var(--glass-border);
  margin-bottom: 22px;
}
.eyebrow::before { content: ''; width: 7px; height: 7px; border-radius: 50%; background: var(--violet-bright); box-shadow: 0 0 12px var(--violet-bright); }

.section-title { font-size: clamp(1.9rem, 4vw, 3rem); margin-bottom: 16px; }
.section-sub { color: var(--text-soft); font-size: 1.08rem; max-width: 680px; }
.grad-text {
  background: var(--accent-grad);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

/* ============ NAV ============ */
.nav {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  background: rgba(8, 5, 16, 0.66);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.logo { display: flex; align-items: center; gap: 11px; font-family: 'Sora'; font-weight: 700; font-size: 1.12rem; }
.logo-mark {
  width: 36px; height: 36px; border-radius: 11px; background: var(--accent-grad);
  display: grid; place-items: center; font-family: 'JetBrains Mono'; font-weight: 700; color: #fff;
  box-shadow: 0 6px 20px -4px rgba(139,92,246,0.6);
}
.nav-links { display: flex; gap: 30px; align-items: center; }
.nav-links a { color: var(--text-soft); font-size: 0.93rem; font-weight: 500; transition: color 0.2s; }
.nav-links a:hover { color: var(--text); }

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 13px 26px; border-radius: 100px; font-weight: 600; font-size: 0.96rem;
  cursor: pointer; border: none; transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease); font-family: 'Inter';
}
.btn-primary { background: var(--accent-grad); color: #fff; box-shadow: 0 10px 30px -8px rgba(139,92,246,0.65); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px -8px rgba(139,92,246,0.8); }
.btn-ghost { background: var(--glass-strong); color: var(--text); border: 1px solid var(--glass-border); }
.btn-ghost:hover { border-color: var(--glass-border-hover); transform: translateY(-2px); }
.btn-sm { padding: 10px 18px; font-size: 0.88rem; }

/* ============ HERO ============ */
.hero { padding: 90px 0 70px; position: relative; }
.hero h1 { font-size: clamp(2.6rem, 7vw, 5rem); font-weight: 800; margin-bottom: 22px; }
.hero-sub { font-size: clamp(1.05rem, 2vw, 1.32rem); color: var(--text-soft); max-width: 640px; margin-bottom: 36px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 56px; }

.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.stat {
  padding: 24px 20px; border-radius: var(--radius-sm);
  background: var(--glass); border: 1px solid var(--glass-border);
}
.stat-num { font-family: 'Sora'; font-size: 2rem; font-weight: 800; }
.stat-label { color: var(--text-mute); font-size: 0.86rem; margin-top: 4px; }

/* ============ GLASS CARD ============ */
.card {
  background: var(--glass); border: 1px solid var(--glass-border);
  border-radius: var(--radius); padding: 30px;
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
  position: relative; overflow: hidden;
}
.card:hover { transform: translateY(-4px); border-color: var(--glass-border-hover); box-shadow: var(--shadow); }

.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.feat-icon {
  width: 50px; height: 50px; border-radius: 14px; display: grid; place-items: center;
  font-size: 1.5rem; background: var(--accent-grad-soft); border: 1px solid var(--glass-border); margin-bottom: 18px;
}
.card h3 { font-size: 1.2rem; margin-bottom: 10px; }
.card p { color: var(--text-soft); font-size: 0.96rem; }

/* ============ COURSE CARDS ============ */
.courses-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.course-card { display: flex; flex-direction: column; padding: 38px; }
.course-card.featured { border-color: var(--glass-border-hover); box-shadow: var(--glow); }
.course-card.featured::before {
  content: ''; position: absolute; inset: 0; border-radius: var(--radius); padding: 1px;
  background: var(--accent-grad); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude; opacity: 0.6; pointer-events: none;
}
.course-tag {
  align-self: flex-start; font-family: 'JetBrains Mono'; font-size: 0.72rem; letter-spacing: 0.12em;
  text-transform: uppercase; padding: 6px 12px; border-radius: 100px; margin-bottom: 18px;
}
.tag-start { background: rgba(34,211,238,0.12); color: var(--cyan); border: 1px solid rgba(34,211,238,0.3); }
.tag-pro { background: var(--accent-grad); color: #fff; }
.course-card h3 { font-size: 1.75rem; margin-bottom: 8px; }
.course-meta { display: flex; gap: 20px; flex-wrap: wrap; margin: 18px 0 22px; color: var(--text-soft); font-size: 0.9rem; }
.course-meta b { color: var(--text); font-family: 'Sora'; }
.course-list { list-style: none; margin: 20px 0; display: flex; flex-direction: column; gap: 11px; }
.course-list li { display: flex; gap: 11px; align-items: flex-start; font-size: 0.95rem; color: var(--text-soft); }
.course-list li::before { content: '✓'; color: var(--violet-bright); font-weight: 700; flex-shrink: 0; }
.course-card .btn { margin-top: auto; }
.price { font-family: 'Sora'; font-size: 1.4rem; font-weight: 700; margin-top: 6px; }
.price span { font-size: 0.9rem; color: var(--text-mute); font-weight: 400; }

/* ============ SKILLS ============ */
.skill-pill {
  display: flex; align-items: center; gap: 10px; padding: 14px 16px; border-radius: var(--radius-sm);
  background: var(--glass); border: 1px solid var(--glass-border); font-size: 0.92rem; transition: border-color 0.25s;
}
.skill-pill:hover { border-color: var(--glass-border-hover); }
.skill-pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--accent-grad); flex-shrink: 0; }

/* ============ SALARY TABLE ============ */
.roles-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.role-card { padding: 26px; }
.role-card h4 { font-size: 1.12rem; margin-bottom: 6px; }
.role-card .role-lvl { font-family: 'JetBrains Mono'; font-size: 0.72rem; color: var(--text-mute); text-transform: uppercase; letter-spacing: 0.1em; }
.role-salary { font-family: 'Sora'; font-size: 1.5rem; font-weight: 800; margin: 14px 0 4px; }
.role-salary.grad { background: var(--accent-grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.role-card p { color: var(--text-soft); font-size: 0.9rem; }
.role-note { font-size: 0.78rem; color: var(--text-mute); margin-top: 12px; }

/* ============ STEPS / METHODOLOGY ============ */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.step { padding: 26px; position: relative; }
.step-num { font-family: 'Sora'; font-size: 2.4rem; font-weight: 800; -webkit-text-fill-color: transparent; -webkit-background-clip: text; background-clip: text; background: var(--accent-grad); opacity: 0.85; }
.step h4 { margin: 8px 0; font-size: 1.05rem; }
.step p { color: var(--text-soft); font-size: 0.9rem; }

/* ============ FAQ ============ */
.faq-item { border-bottom: 1px solid rgba(255,255,255,0.08); }
.faq-q { width: 100%; text-align: left; background: none; border: none; color: var(--text); font-family: 'Sora'; font-weight: 600; font-size: 1.08rem; padding: 22px 0; cursor: pointer; display: flex; justify-content: space-between; gap: 16px; align-items: center; }
.faq-q .ico { color: var(--violet-bright); transition: transform 0.3s var(--ease); flex-shrink: 0; font-size: 1.4rem; }
.faq-item.open .faq-q .ico { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.35s var(--ease); color: var(--text-soft); }
.faq-item.open .faq-a { max-height: 320px; }
.faq-a-inner { padding-bottom: 22px; }

/* ============ CTA BANNER ============ */
.cta-banner {
  border-radius: var(--radius); padding: 60px 40px; text-align: center; position: relative; overflow: hidden;
  background: var(--accent-grad-soft); border: 1px solid var(--glass-border-hover);
}
.cta-banner h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); margin-bottom: 14px; }
.cta-banner p { color: var(--text-soft); max-width: 540px; margin: 0 auto 28px; }

/* ============ FOOTER ============ */
.footer { border-top: 1px solid rgba(255,255,255,0.06); padding: 40px 0; color: var(--text-mute); font-size: 0.9rem; }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 18px; align-items: center; }

/* ============ COURSE PAGE ============ */
.course-hero { padding: 70px 0 40px; }
.back-link { display: inline-flex; align-items: center; gap: 7px; color: var(--text-soft); font-size: 0.9rem; margin-bottom: 24px; transition: color 0.2s; }
.back-link:hover { color: var(--violet-bright); }
.course-hero h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); margin-bottom: 16px; }
.course-hero .lead { font-size: 1.15rem; color: var(--text-soft); max-width: 720px; }
.course-badges { display: flex; gap: 14px; flex-wrap: wrap; margin: 26px 0; }
.cbadge { display: flex; flex-direction: column; padding: 16px 22px; border-radius: var(--radius-sm); background: var(--glass); border: 1px solid var(--glass-border); }
.cbadge b { font-family: 'Sora'; font-size: 1.4rem; }
.cbadge span { color: var(--text-mute); font-size: 0.82rem; }

/* Schedule */
.sched-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.sched-card { padding: 26px; }
.sched-card h4 { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; font-size: 1.1rem; }
.sched-card h4 .badge-days { font-family: 'JetBrains Mono'; font-size: 0.75rem; padding: 4px 10px; border-radius: 8px; background: var(--accent-grad-soft); border: 1px solid var(--glass-border); color: var(--violet-bright); }
.sched-table { width: 100%; border-collapse: collapse; font-size: 0.86rem; }
.sched-table td, .sched-table th { padding: 9px 8px; text-align: left; border-bottom: 1px solid rgba(255,255,255,0.06); }
.sched-table th { color: var(--text-mute); font-weight: 500; font-family: 'JetBrains Mono'; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.08em; }
.sched-table td.wk { color: var(--violet-bright); font-family: 'JetBrains Mono'; }

/* Module group */
.module-group { margin-bottom: 18px; }
.module-head {
  display: flex; align-items: center; gap: 14px; padding: 18px 24px; margin-bottom: 4px;
  background: var(--accent-grad-soft); border: 1px solid var(--glass-border); border-radius: var(--radius-sm);
}
.module-head .mnum { font-family: 'JetBrains Mono'; font-weight: 700; color: var(--violet-bright); font-size: 0.85rem; }
.module-head h3 { font-size: 1.15rem; }
.module-head .mcount { margin-left: auto; color: var(--text-mute); font-size: 0.82rem; font-family: 'JetBrains Mono'; }

/* Lesson accordion */
.lesson {
  border: 1px solid var(--glass-border); border-radius: var(--radius-sm); margin-bottom: 12px;
  background: var(--glass); overflow: hidden; transition: border-color 0.25s;
}
.lesson.open { border-color: var(--glass-border-hover); }
.lesson-head { width: 100%; display: flex; align-items: center; gap: 18px; padding: 20px 24px; cursor: pointer; background: none; border: none; text-align: left; color: var(--text); }
.lesson-n {
  flex-shrink: 0; width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  font-family: 'Sora'; font-weight: 800; font-size: 1.1rem; background: var(--accent-grad-soft);
  border: 1px solid var(--glass-border); color: var(--violet-bright);
}
.lesson-htext { flex: 1; }
.lesson-htext .day-tag { font-family: 'JetBrains Mono'; font-size: 0.7rem; color: var(--text-mute); letter-spacing: 0.08em; text-transform: uppercase; }
.lesson-htext h4 { font-size: 1.05rem; font-weight: 600; margin-top: 3px; font-family: 'Sora'; }
.lesson-chev { color: var(--violet-bright); font-size: 1.3rem; transition: transform 0.3s var(--ease); flex-shrink: 0; }
.lesson.open .lesson-chev { transform: rotate(180deg); }
.lesson-body { max-height: 0; overflow: hidden; transition: max-height 0.45s var(--ease); }
.lesson.open .lesson-body { max-height: 1600px; }
.lesson-body-inner { padding: 4px 24px 26px; }
.lesson-goal { padding: 14px 16px; border-radius: 12px; background: rgba(139,92,246,0.08); border-left: 3px solid var(--violet); margin-bottom: 20px; font-size: 0.95rem; color: var(--text); }
.lesson-goal b { color: var(--violet-bright); }

.block-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.lblock h5 { font-family: 'JetBrains Mono'; font-size: 0.74rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--violet-bright); margin-bottom: 12px; display: flex; align-items: center; gap: 7px; }
.lblock ol, .lblock ul { padding-left: 0; list-style: none; display: flex; flex-direction: column; gap: 9px; }
.lblock li { font-size: 0.9rem; color: var(--text-soft); display: flex; gap: 10px; align-items: flex-start; line-height: 1.5; }
.theory li::before { content: '▸'; color: var(--indigo); flex-shrink: 0; }
.practice { counter-reset: step; }
.practice li { counter-increment: step; }
.practice li::before { content: counter(step); flex-shrink: 0; width: 20px; height: 20px; border-radius: 6px; background: var(--accent-grad-soft); border: 1px solid var(--glass-border); color: var(--violet-bright); font-family: 'JetBrains Mono'; font-size: 0.7rem; display: grid; place-items: center; margin-top: 1px; }

.lesson-foot { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 22px; }
.foot-box { padding: 16px; border-radius: 12px; background: var(--glass); border: 1px solid var(--glass-border); }
.foot-box .label { font-family: 'JetBrains Mono'; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.1em; color: var(--text-mute); margin-bottom: 6px; }
.foot-box.result { border-color: rgba(34,211,238,0.25); background: rgba(34,211,238,0.05); }
.foot-box.result .label { color: var(--cyan); }
.foot-box p { font-size: 0.9rem; color: var(--text-soft); }
.kw { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 18px; }
.kw span { font-family: 'JetBrains Mono'; font-size: 0.72rem; padding: 4px 10px; border-radius: 8px; background: var(--glass-strong); border: 1px solid var(--glass-border); color: var(--text-soft); }

/* ============ RESPONSIVE ============ */
@media (max-width: 900px) {
  .grid-3, .grid-4, .roles-grid, .steps { grid-template-columns: repeat(2, 1fr); }
  .courses-grid, .sched-grid, .grid-2 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .block-grid, .lesson-foot { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .section { padding: 64px 0; }
}
@media (max-width: 560px) {
  .grid-3, .grid-4, .roles-grid, .steps, .stats { grid-template-columns: 1fr; }
  .lesson-head { padding: 16px; gap: 12px; }
  .hero h1 { font-size: 2.4rem; }
}

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }