/* ============================================================
   微笑動漫 — Glass Design System CSS
   Apple iOS Glassmorphism + Premium Media Style
   Palette:
     霧白      #F5F7F6
     科技米白   #F6F8F9
     淡石灰    #C3C6CE
     靈性灰藍   #3E4A54
     靜夜深藍黑  #1E242B
   ============================================================ */

/* ---------- CSS Custom Properties (Tokens) ---------- */
:root {
  /* Background */
  --bg-base:        #1E242B;
  --bg-section:     #242C35;
  --bg-surface:     #2A3340;

  /* Glass */
  --glass-bg:       rgba(245, 247, 246, 0.07);
  --glass-bg-mid:   rgba(245, 247, 246, 0.11);
  --glass-bg-light: rgba(245, 247, 246, 0.16);
  --glass-border:   rgba(245, 247, 246, 0.14);
  --glass-border-h: rgba(245, 247, 246, 0.26);
  --glass-blur:     24px;
  --glass-blur-lg:  36px;
  --glass-shadow:   0 8px 40px rgba(0,0,0,0.32), inset 0 1px 0 rgba(255,255,255,0.08);
  --glass-shadow-h: 0 16px 60px rgba(0,0,0,0.45), inset 0 1px 0 rgba(255,255,255,0.12);

  /* Text */
  --text-primary:   #F5F7F6;
  --text-secondary: #C3C6CE;
  --text-muted:     #7B8594;
  --text-label:     #3E4A54;

  /* Accent */
  --accent-blue:    #63A8FF;
  --accent-violet:  #8F6BFF;
  --accent-pink:    #FF6BAE;
  --accent-cyan:    #6FECFF;

  /* Gradient */
  --grad-hero:      linear-gradient(135deg, #63A8FF 0%, #8F6BFF 50%, #FF6BAE 100%);
  --grad-card-glow: linear-gradient(135deg, rgba(99,168,255,0.15) 0%, rgba(143,107,255,0.15) 100%);
  --grad-bg:        linear-gradient(180deg, #1E242B 0%, #181D24 100%);

  /* Border Radius */
  --radius-xl:  28px;
  --radius-lg:  20px;
  --radius-md:  14px;
  --radius-sm:  10px;
  --radius-pill: 999px;

  /* Spacing */
  --space-xs:  8px;
  --space-sm:  16px;
  --space-md:  24px;
  --space-lg:  40px;
  --space-xl:  64px;
  --space-2xl: 96px;

  /* Typography */
  --font-main: 'Inter', 'Noto Sans TC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-jp:   'Noto Serif JP', Georgia, serif;

  /* Transitions */
  --trans-fast:   all 0.18s cubic-bezier(0.4,0,0.2,1);
  --trans-smooth: all 0.32s cubic-bezier(0.4,0,0.2,1);
  --trans-bounce: all 0.42s cubic-bezier(0.34,1.56,0.64,1);
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
  margin: 0; padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-main);
  background: var(--grad-bg);
  background-attachment: fixed;
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; font-family: inherit; border: none; }

/* ---------- Glass Card Utility ---------- */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

.glass-mid {
  background: var(--glass-bg-mid);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
}

.glass-light {
  background: var(--glass-bg-light);
  backdrop-filter: blur(var(--glass-blur-lg));
  -webkit-backdrop-filter: blur(var(--glass-blur-lg));
  border: 1px solid var(--glass-border-h);
  box-shadow: var(--glass-shadow);
}

.glass:hover, .glass-mid:hover {
  border-color: var(--glass-border-h);
  box-shadow: var(--glass-shadow-h);
  transform: translateY(-4px);
  transition: var(--trans-smooth);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: var(--trans-smooth);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, rgba(99,168,255,0.25), rgba(143,107,255,0.25));
  border: 1px solid rgba(99,168,255,0.4);
  color: #A8D4FF;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.btn-primary:hover {
  background: linear-gradient(135deg, rgba(99,168,255,0.35), rgba(143,107,255,0.35));
  border-color: rgba(99,168,255,0.6);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(99,168,255,0.2);
}

.btn-secondary {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.btn-secondary:hover {
  border-color: var(--glass-border-h);
  color: var(--text-primary);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  padding: 8px 16px;
}
.btn-ghost:hover {
  color: var(--text-primary);
  background: var(--glass-bg);
  border-color: var(--glass-border);
}

.btn-icon {
  width: 40px; height: 40px;
  padding: 0;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  font-size: 16px;
}

/* ---------- Chip / Tag ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--trans-fast);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.chip:hover, .chip.active {
  background: var(--glass-bg-light);
  border-color: rgba(99,168,255,0.4);
  color: var(--accent-blue);
}
.chip.tag-genre { font-size: 11px; padding: 3px 10px; }

/* ---------- Section Layout ---------- */
.section {
  padding: var(--space-xl) 0;
  position: relative;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
  flex-wrap: wrap;
  gap: 12px;
}

.section-title {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  position: relative;
  padding-left: 16px;
}
.section-title::before {
  content: '';
  position: absolute;
  left: 0; top: 4px; bottom: 4px;
  width: 3px;
  background: var(--grad-hero);
  border-radius: 2px;
}

.section-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  display: flex; align-items: center; gap: 4px;
  transition: var(--trans-fast);
}
.section-link:hover { color: var(--accent-blue); }

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(245,247,246,0.12);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(245,247,246,0.22); }

/* ---------- Skeleton Loading ---------- */
@keyframes shimmer {
  0%   { background-position: -600px 0; }
  100% { background-position: 600px 0; }
}
.skeleton {
  background: linear-gradient(90deg,
    rgba(255,255,255,0.04) 25%,
    rgba(255,255,255,0.08) 37%,
    rgba(255,255,255,0.04) 63%);
  background-size: 600px 100%;
  animation: shimmer 1.5s infinite linear;
  border-radius: var(--radius-md);
}

/* ---------- Status Colors ---------- */
.status-airing    { color: #52D68A; }
.status-finished  { color: var(--text-muted); }
.status-upcoming  { color: var(--accent-cyan); }

/* ---------- Glow Effect ---------- */
.glow-blue   { box-shadow: 0 0 20px rgba(99,168,255,0.3); }
.glow-violet { box-shadow: 0 0 20px rgba(143,107,255,0.3); }
.glow-pink   { box-shadow: 0 0 20px rgba(255,107,174,0.3); }

/* ---------- Grid Utilities ---------- */
.grid-4 {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
}

/* ---------- Scroll Row ---------- */
.scroll-row {
  display: flex;
  gap: var(--space-md);
  overflow-x: auto;
  padding-bottom: var(--space-xs);
  scrollbar-width: none;
}
.scroll-row::-webkit-scrollbar { display: none; }

/* ---------- Gradient Text ---------- */
.grad-text {
  background: var(--grad-hero);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ---------- Music Card ---------- */
.music-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.3s cubic-bezier(0.4,0,0.2,1), box-shadow 0.3s cubic-bezier(0.4,0,0.2,1), border-color 0.3s;
  cursor: pointer;
}
.music-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(123,104,238,0.22);
  border-color: rgba(143,107,255,0.35);
}

/* 有封面圖時用 */
.music-card-cover {
  width: 100%;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  position: relative;
}
.music-card-cover img {
  width: 100%; height: 100%;
  object-fit: cover;
}

/* 無封面圖佔位 */
.music-card-cover-placeholder {
  width: 100%;
  aspect-ratio: 1 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(143,107,255,0.18) 0%, rgba(30,36,43,0.92) 100%);
  font-size: 36px;
  position: relative;
}

/* 播放按鈕 */
.music-play-btn {
  position: absolute;
  bottom: 12px; right: 12px;
  width: 36px; height: 36px;
  border-radius: 50%;
  background: rgba(143,107,255,0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center; justify-content: center;
  font-size: 13px;
  color: #fff;
  border: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 12px rgba(0,0,0,0.35), 0 0 0 2px rgba(143,107,255,0.3);
}
.music-play-btn:hover {
  transform: scale(1.12);
  box-shadow: 0 6px 20px rgba(143,107,255,0.5), 0 0 0 3px rgba(143,107,255,0.4);
}

/* 卡片文字區 */
.music-card-info {
  padding: 12px 14px 14px;
}
.music-card-type {
  font-size: 11px;
  font-weight: 600;
  color: var(--accent-violet);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-bottom: 4px;
}
.music-card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 3px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.music-card-artist {
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.music-card-anime {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--text-muted);
}

/* ---------- Divider ---------- */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--glass-border), transparent);
  margin: var(--space-xl) 0;
}

/* ---------- Responsive ---------- */
@media (max-width: 1280px) {
  .grid-4 { grid-template-columns: repeat(5, 1fr); }
}

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
  .container { padding: 0 var(--space-md); }
}

@media (max-width: 768px) {
  .grid-4 { grid-template-columns: repeat(3, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .section { padding: var(--space-lg) 0; }
  .section-title { font-size: 18px; }
}

@media (max-width: 480px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .container { padding: 0 var(--space-sm); }
}