@import url('https://fonts.googleapis.com/css2?family=Cairo:wght@400;500;600;700;800&family=Manrope:wght@600;700;800&display=swap');

:root {
  --ink: #192126;
  --muted: #68747a;
  --paper: #f6f4ef;
  --card: #fffdf9;
  --line: #dedbd2;
  --accent: #df5a3d;
  --accent-dark: #b83f2b;
  --teal: #176b68;
  --shadow: 0 16px 32px rgba(31, 39, 39, 0.08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: 'Cairo', sans-serif;
  line-height: 1.7;
}

body::before {
  position: fixed;
  z-index: -1;
  inset: 0;
  content: '';
  opacity: .45;
  background-image: radial-gradient(#d3cec2 0.7px, transparent 0.7px);
  background-size: 18px 18px;
  pointer-events: none;
}

a { color: inherit; text-decoration: none; }

.site-header {
  border-bottom: 1px solid rgba(222, 219, 210, .9);
  background: rgba(246, 244, 239, .9);
  backdrop-filter: blur(12px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1120px, calc(100% - 40px));
  min-height: 78px;
  margin: auto;
}

.brand, .back-link { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; }
.brand { font-size: 1.08rem; }
.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  color: #fff;
  border-radius: 10px;
  background: var(--accent);
  font-family: 'Manrope', sans-serif;
  font-size: .85rem;
  direction: ltr;
}
.header-label, .back-link { color: var(--muted); font-size: .85rem; }
.back-link { transition: color .2s ease; }
.back-link:hover { color: var(--accent-dark); }

.container { width: min(1120px, calc(100% - 40px)); margin: auto; }
.home-content { padding: 78px 0 96px; }
.intro { max-width: 680px; margin-bottom: 44px; }
.eyebrow {
  margin: 0 0 10px;
  color: var(--accent-dark);
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .08em;
}
h1 { margin: 0; font-size: clamp(2rem, 5vw, 4.3rem); line-height: 1.2; letter-spacing: -.03em; }
.intro-text { margin: 16px 0 20px; color: var(--muted); font-size: 1.05rem; }
.lesson-count { display: inline-flex; align-items: center; gap: 7px; color: var(--teal); font-weight: 700; }
.lesson-count::before { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); content: ''; }

.lessons-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.lesson-card {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 94px;
  padding: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--card);
  box-shadow: 0 5px 0 rgba(25, 33, 38, .03);
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.lesson-card::after { position: absolute; right: 0; bottom: 0; width: 4px; height: 0; background: var(--accent); content: ''; transition: height .2s ease; }
.lesson-card:hover { border-color: #c8bfb3; box-shadow: var(--shadow); transform: translateY(-3px); }
.lesson-card:hover::after { height: 100%; }
.lesson-number { color: var(--accent); font-family: 'Manrope', sans-serif; font-size: .83rem; font-weight: 800; direction: ltr; }
.lesson-title { font-size: .94rem; font-weight: 700; line-height: 1.45; }

.video-content { padding: 58px 0 100px; }
.breadcrumb { display: inline-flex; gap: 8px; margin-bottom: 34px; color: var(--teal); font-weight: 700; font-size: .9rem; }
.breadcrumb span { transition: transform .2s ease; }
.breadcrumb:hover span { transform: translateX(4px); }
.video-heading { margin-bottom: 32px; }
.video-heading h1 { font-size: clamp(1.8rem, 4vw, 3.5rem); }
.video-frame {
  width: 100%;
  overflow: hidden;
  border: 1px solid #d4d0c5;
  border-radius: 10px;
  background: #202a2d;
  box-shadow: var(--shadow);
}
.video-player { display: block; width: 100%; aspect-ratio: 16 / 9; background: #202a2d; }

.site-footer { padding: 24px 20px; border-top: 1px solid var(--line); color: var(--muted); text-align: center; font-size: .82rem; }
.site-footer p { margin: 0; }

@media (max-width: 850px) {
  .lessons-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 600px) {
  .header-inner, .container { width: min(100% - 28px, 1120px); }
  .header-inner { min-height: 68px; }
  .header-label { display: none; }
  .home-content { padding: 56px 0 72px; }
  .intro { margin-bottom: 32px; }
  .lessons-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
  .lesson-card { min-height: 84px; padding: 13px 12px; gap: 9px; }
  .lesson-title { font-size: .84rem; }
  .lesson-number { font-size: .72rem; }
  .video-content { padding: 42px 0 72px; }
}

@media (max-width: 360px) {
  .lessons-grid { grid-template-columns: 1fr; }
}