/* ===============================
   DESIGN SYSTEM — CSS VARIABLES
   Change brand colors/spacing here only. Do not hardcode colors elsewhere.
=============================== */
:root {
  --primary: #6C63FF;
  --primary-hover: #5A52E0;
  --dark: #111122;
  --background: #F8FAFC;
  --surface: #FFFFFF;
  --text: #1E293B;
  --muted: #64748B;
  --border: #E2E8F0;
  --danger: #EF4444;
  --success: #10B981;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 16px;
  --space-4: 24px;
  --space-5: 40px;
  --space-6: 64px;

  --shadow-sm: 0 1px 2px rgba(17, 17, 34, 0.06);
  --shadow-md: 0 8px 24px rgba(17, 17, 34, 0.08);

  --header-height: 64px;
}

/* ===============================
   RESET
=============================== */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background: var(--background);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
button { font-family: inherit; cursor: pointer; }
h1, h2, h3, h4 { font-family: var(--font-display); margin: 0 0 var(--space-2); line-height: 1.15; }

/* Accessible focus state — never remove without replacing */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--dark);
  color: #fff;
  padding: var(--space-2) var(--space-3);
  z-index: 200;
}
.skip-link:focus { left: var(--space-2); top: var(--space-2); }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-3);
}

/* ===============================
   BUTTONS
=============================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 14px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  padding: 10px 18px;
  transition: background 0.15s ease, transform 0.1s ease, border-color 0.15s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-outline { background: transparent; color: var(--text); border-color: var(--border); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-lg { padding: 14px 26px; font-size: 16px; }
.btn-sm { padding: 7px 14px; font-size: 13px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
}
.icon-btn:hover { border-color: var(--primary); color: var(--primary); }

/* ===============================
   HEADER
=============================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 250, 252, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.02em;
  color: var(--dark);
}
.logo-accent { color: var(--primary); }
.header-actions { display: flex; gap: var(--space-2); }

.search-bar {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  padding: var(--space-3) 0;
}
.search-bar form { display: flex; gap: var(--space-2); }
.search-bar input {
  flex: 1;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  font-family: var(--font-body);
  font-size: 14px;
}
.search-bar input:focus { border-color: var(--primary); }

/* ===============================
   MOBILE MENU
=============================== */
.mobile-menu {
  position: fixed;
  inset: var(--header-height) 0 0 auto;
  width: min(80vw, 320px);
  background: var(--surface);
  border-left: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  z-index: 150;
  padding: var(--space-4) var(--space-3);
}
.mobile-menu li + li { margin-top: var(--space-1); }
.mobile-menu a {
  display: block;
  padding: 12px 10px;
  border-radius: var(--radius-sm);
  font-weight: 500;
}
.mobile-menu a:hover { background: var(--background); color: var(--primary); }

/* ===============================
   NOTICE BAR
   Ticker animation can be disabled via .no-animation (toggled from settings in Phase 3)
=============================== */
.notice-bar {
  background: var(--dark);
  color: #fff;
  overflow: hidden;
  white-space: nowrap;
  padding: 8px 0;
}
.notice-bar[hidden] { display: none; }
.notice-track {
  display: inline-block;
  padding-left: 100%;
  font-size: 13px;
  font-family: var(--font-mono);
  animation: notice-scroll 18s linear infinite;
}
.notice-bar.no-animation .notice-track {
  animation: none;
  padding-left: var(--space-3);
}
@keyframes notice-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-100%); }
}
@media (prefers-reduced-motion: reduce) {
  .notice-track { animation: none; padding-left: var(--space-3); }
}

/* ===============================
   HERO
=============================== */
.hero {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  padding: var(--space-6) var(--space-3) var(--space-5);
}
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  margin: 0 0 var(--space-2);
}
.hero h1 {
  font-size: 44px;
  color: var(--dark);
  max-width: 12ch;
}
.text-accent { color: var(--primary); }
.hero-sub {
  color: var(--muted);
  max-width: 46ch;
  margin: var(--space-3) 0 var(--space-4);
}

/* Signature "signal" motif — used in hero + thumbnail placeholders */
.hero-signal, .placeholder-thumb {
  display: flex;
  align-items: flex-end;
  gap: 6px;
  height: 90px;
}
.hero-signal .bar, .placeholder-thumb .bar {
  width: 10px;
  background: var(--primary);
  border-radius: 4px;
  opacity: 0.85;
  animation: signal-pulse 1.6s ease-in-out infinite;
}
.hero-signal .bar:nth-child(1), .placeholder-thumb .bar:nth-child(1) { height: 30%; animation-delay: 0s; }
.hero-signal .bar:nth-child(2), .placeholder-thumb .bar:nth-child(2) { height: 55%; animation-delay: 0.15s; }
.hero-signal .bar:nth-child(3), .placeholder-thumb .bar:nth-child(3) { height: 90%; animation-delay: 0.3s; }
.hero-signal .bar:nth-child(4), .placeholder-thumb .bar:nth-child(4) { height: 65%; animation-delay: 0.45s; }
.hero-signal .bar:nth-child(5), .placeholder-thumb .bar:nth-child(5) { height: 40%; animation-delay: 0.6s; }
@keyframes signal-pulse {
  0%, 100% { transform: scaleY(0.85); }
  50% { transform: scaleY(1); }
}
@media (prefers-reduced-motion: reduce) {
  .hero-signal .bar, .placeholder-thumb .bar { animation: none; }
}

/* ===============================
   FEATURE CARDS
=============================== */
.features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
  padding-bottom: var(--space-6);
}
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}
.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: rgba(108, 99, 255, 0.1);
  color: var(--primary);
  font-size: 16px;
  margin-bottom: var(--space-2);
}
.feature-card h3 { font-size: 16px; }
.feature-card p { color: var(--muted); font-size: 14px; margin: 0; }

/* ===============================
   PLAYLIST SECTION
=============================== */
.playlists { padding-bottom: var(--space-6); }
.section-heading { margin-bottom: var(--space-4); }
.section-heading h2 { font-size: 26px; color: var(--dark); }

.card-grid {
  display: grid;
  /* Mobile-first default: 1 column. css/responsive.css builds this up
     to 2/3/4 columns at wider breakpoints — don't set repeat(4,1fr)
     here again, or phones fall through to 4 tiny columns. */
  grid-template-columns: 1fr;
  gap: var(--space-3);
}
.playlist-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}
.playlist-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.thumb, .placeholder-thumb {
  background: var(--dark);
  height: 140px;
  justify-content: center;
}
.thumb img { width: 100%; height: 100%; object-fit: cover; }
.card-body { padding: var(--space-3); }
.badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--primary);
  background: rgba(108, 99, 255, 0.1);
  border-radius: 999px;
  padding: 3px 10px;
  margin-bottom: var(--space-2);
}
.card-title {
  font-size: 16px;
  margin-bottom: var(--space-1);
  overflow-wrap: break-word;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-desc {
  color: var(--muted);
  font-size: 13px;
  margin: 0 0 var(--space-3);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}
.card-meta time { font-family: var(--font-mono); font-size: 12px; color: var(--muted); }

.pagination-controls { display: flex; justify-content: center; margin-top: var(--space-5); }
.empty-state { text-align: center; color: var(--muted); padding: var(--space-5) 0; }

/* Skeleton loading state — toggled via .is-loading class by home.js */
.skeleton {
  background: linear-gradient(90deg, var(--border) 25%, #eef1f6 37%, var(--border) 63%);
  background-size: 400% 100%;
  animation: skeleton-loading 1.4s ease infinite;
  border-radius: var(--radius-sm);
}
@keyframes skeleton-loading {
  0% { background-position: 100% 50%; }
  100% { background-position: 0 50%; }
}

/* ===============================
   TOASTS
   Container/toasts are created dynamically by utils.js showToast()
=============================== */
.toast-container {
  position: fixed;
  bottom: var(--space-3);
  right: var(--space-3);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  z-index: 300;
}
.toast {
  background: var(--dark);
  color: #fff;
  font-size: 13px;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.toast.show { opacity: 1; transform: translateY(0); }
.toast-success { border-left: 3px solid var(--success); }
.toast-error { border-left: 3px solid var(--danger); }
.toast-warning { border-left: 3px solid #F59E0B; }

/* ===============================
   SEARCH PAGE
=============================== */
.search-page { padding: var(--space-5) 0 var(--space-6); }
.search-page h1 { font-size: 26px; color: var(--dark); margin-bottom: var(--space-3); }
.search-form { display: flex; gap: var(--space-2); margin-bottom: var(--space-4); max-width: 480px; }
.search-form input {
  flex: 1;
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  font-family: var(--font-body);
  font-size: 14px;
}
.search-form input:focus { border-color: var(--primary); }
.search-status { color: var(--muted); font-size: 13px; margin-bottom: var(--space-3); }

/* ===============================
   MODAL (adblock notice, etc.)
=============================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(17, 17, 34, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 400;
  padding: var(--space-3);
}
.modal-overlay[hidden] { display: none; }
.modal-box {
  background: var(--surface);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  max-width: 360px;
  width: 100%;
  box-shadow: var(--shadow-md);
}
.modal-box h3 { font-size: 16px; margin-bottom: var(--space-2); }
.modal-box p { color: var(--muted); font-size: 14px; margin-bottom: var(--space-4); }
.modal-actions { display: flex; justify-content: flex-end; gap: var(--space-2); }

/* ===============================
   FOOTER
=============================== */
.site-footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.75);
  padding-top: var(--space-5);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: var(--space-4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}
.footer-brand .logo { color: #fff; }
.footer-brand p { margin: var(--space-1) 0 0; font-size: 13px; color: rgba(255, 255, 255, 0.55); }
.footer-social, .footer-links { display: flex; gap: var(--space-3); font-size: 13px; }
.footer-social a:hover, .footer-links a:hover { color: #fff; }
.footer-copy {
  text-align: center;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.45);
  padding: var(--space-3) 0;
  margin: 0;
}