.main-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-height);
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 40px;
  z-index: 100;
  background: linear-gradient(to bottom, rgba(0,0,0,0.8), transparent);
  transition: background var(--transition-medium);
}
.main-header.scrolled { background: var(--color-bg); }

.header-left { display: flex; align-items: center; gap: 32px; }
.logo { font-weight: 800; font-size: 24px; color: var(--color-accent); letter-spacing: 1px; }
.main-nav { display: flex; gap: 20px; }
.nav-link { font-size: 14px; color: var(--color-text-muted); }
.nav-link.active, .nav-link:hover { color: var(--color-text); }

.header-right { display: flex; align-items: center; gap: 20px; }
.icon-btn { font-size: 18px; }
.profile-menu img { width: 32px; height: 32px; border-radius: var(--radius-sm); }

.hero-banner {
  position: relative;
  height: 70vh;
  min-height: 400px;
  display: flex;
  align-items: flex-end;
  padding: 0 40px 60px;
  background-size: cover;
  background-position: center top;
}
.hero-content { max-width: 560px; }
.hero-title { font-size: 42px; margin-bottom: 12px; }
.hero-description {
  font-size: 16px;
  color: var(--color-text-muted);
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.hero-actions { display: flex; gap: 12px; }

#app-root { padding: 0 40px 60px; margin-top: -80px; position: relative; z-index: 2; }

.content-row {
  margin-bottom: 32px;
}
.content-row .row-title { font-size: 18px; margin-bottom: 10px; }
.content-row .row-track {
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scroll-behavior: smooth;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
}
.channel-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }

.category-filter {
  display: flex;
  gap: 10px;
  overflow-x: auto;
  padding: 16px 0;
}

@media (max-width: 768px) {
  .main-header, #app-root, .hero-banner { padding-left: 16px; padding-right: 16px; }
  .hero-title { font-size: 28px; }
}