/* 娛樂381 冰雪藍白主題 CSS (Ice & Snow Blue-White Premium Theme) */
:root {
  --bg-dark: #050b14;
  --bg-card: rgba(12, 24, 46, 0.75);
  --bg-card-hover: rgba(20, 38, 70, 0.85);
  --bg-elevated: #11223e;
  --bg-glass: rgba(15, 30, 56, 0.6);
  
  --accent-cyan: #38bdf8;
  --accent-blue: #0284c7;
  --accent-ice: #e0f2fe;
  --accent-glow: rgba(56, 189, 248, 0.4);
  --accent-spark: #7dd3fc;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  
  --border-silver: rgba(224, 242, 254, 0.18);
  --border-glow: rgba(56, 189, 248, 0.4);
  --border-highlight: rgba(255, 255, 255, 0.35);
  
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  --font-heading: "Cinzel", "Noto Serif TC", serif, sans-serif;
  
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 18px;
  
  --shadow-ice: 0 8px 32px 0 rgba(0, 10, 30, 0.6);
  --shadow-glow: 0 0 25px rgba(56, 189, 248, 0.25);
  --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

body {
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(14, 116, 144, 0.25) 0%, transparent 60%),
    radial-gradient(circle at 85% 30%, rgba(2, 132, 199, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 15% 70%, rgba(56, 189, 248, 0.08) 0%, transparent 50%);
  background-attachment: fixed;
  color: var(--text-main);
  font-family: var(--font-family);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: #060d19;
}
::-webkit-scrollbar-thumb {
  background: #1e3a8a;
  border-radius: 4px;
  border: 1px solid rgba(56, 189, 248, 0.3);
}
::-webkit-scrollbar-thumb:hover {
  background: #0284c7;
}

/* Top Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(5, 11, 20, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-silver);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--text-main);
  cursor: pointer;
}

.brand-title {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: 2px;
  background: linear-gradient(135deg, #ffffff 30%, #7dd3fc 70%, #38bdf8 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 10px rgba(56, 189, 248, 0.3);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
}

.nav-item button {
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.6rem 1.1rem;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  position: relative;
}

.nav-item button:hover {
  color: #ffffff;
  background: rgba(56, 189, 248, 0.12);
  text-shadow: 0 0 8px rgba(56, 189, 248, 0.5);
}

.nav-item button.active {
  color: #ffffff;
  background: linear-gradient(135deg, rgba(2, 132, 199, 0.35), rgba(56, 189, 248, 0.2));
  border: 1px solid rgba(56, 189, 248, 0.5);
  box-shadow: inset 0 0 12px rgba(56, 189, 248, 0.2), 0 0 12px rgba(56, 189, 248, 0.3);
}

.nav-item button.active::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 20%;
  right: 20%;
  height: 2px;
  background: var(--accent-spark);
  box-shadow: 0 0 8px var(--accent-spark);
  border-radius: 2px;
}

/* Download Button in Navigation */
.nav-download-btn {
  background: linear-gradient(135deg, #0284c7, #38bdf8);
  color: #ffffff !important;
  padding: 0.55rem 1.25rem;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-sm);
  text-decoration: none;
  border: 1px solid #e0f2fe;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.35);
  white-space: nowrap;
}

.nav-download-btn:hover {
  background: linear-gradient(135deg, #0369a1, #0284c7);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.65);
  transform: translateY(-1px);
}

/* Hero Download Button */
.hero-download-btn {
  display: inline-block;
  background: linear-gradient(135deg, #0284c7 0%, #38bdf8 100%);
  color: #ffffff;
  padding: 0.85rem 2.2rem;
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 1px;
  border-radius: var(--radius-md);
  text-decoration: none;
  border: 1px solid #e0f2fe;
  box-shadow: 0 0 25px rgba(56, 189, 248, 0.4), inset 0 0 10px rgba(255, 255, 255, 0.2);
  transition: var(--transition);
  pointer-events: auto;
}

.hero-download-btn:hover {
  background: linear-gradient(135deg, #0369a1 0%, #0284c7 100%);
  box-shadow: 0 0 35px rgba(56, 189, 248, 0.7);
  transform: translateY(-2px);
}

/* Global Search Input */
.search-box {
  position: relative;
  width: 240px;
}

.search-box input {
  width: 100%;
  padding: 0.55rem 1.1rem;
  background: rgba(10, 20, 38, 0.8);
  border: 1px solid var(--border-silver);
  border-radius: 20px;
  color: #ffffff;
  font-size: 0.88rem;
  outline: none;
  transition: var(--transition);
}

.search-box input:focus {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.35);
  background: rgba(15, 30, 56, 0.95);
}

/* Main Container */
.main-wrapper {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  position: relative;
  z-index: 1;
}

/* Hero Banner Section (Video Hero) */
.hero-section {
  position: relative;
  width: 100%;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-silver);
  box-shadow: var(--shadow-ice), 0 0 35px rgba(2, 132, 199, 0.25);
  background: var(--bg-card);
  margin-bottom: 2.5rem;
}

.video-container {
  position: relative;
  width: 100%;
  max-height: 520px;
  background: #000;
  overflow: hidden;
}

.hero-video {
  width: 100%;
  height: 100%;
  max-height: 520px;
  object-fit: cover;
  display: block;
  filter: brightness(0.92) contrast(1.05);
}

.hero-overlay {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(
    to bottom,
    rgba(5, 11, 20, 0.3) 0%,
    transparent 50%,
    rgba(5, 11, 20, 0.95) 100%
  );
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 2.5rem;
  pointer-events: none;
}

.hero-title-box {
  pointer-events: auto;
}

.hero-title {
  font-size: 2.5rem;
  font-weight: 900;
  color: #ffffff;
  letter-spacing: 3px;
  text-shadow: 0 4px 15px rgba(0, 0, 0, 0.9), 0 0 20px rgba(56, 189, 248, 0.4);
  line-height: 1.2;
}

.hero-sub {
  color: var(--accent-spark);
  font-size: 1.1rem;
  margin-top: 0.4rem;
  font-weight: 500;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.8);
}

.video-controls {
  position: absolute;
  bottom: 1rem;
  right: 1.5rem;
  z-index: 10;
  display: flex;
  gap: 0.5rem;
  pointer-events: auto;
}

.ctrl-btn {
  background: rgba(15, 30, 56, 0.8);
  border: 1px solid var(--border-silver);
  color: var(--text-main);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  backdrop-filter: blur(8px);
  transition: var(--transition);
}

.ctrl-btn:hover {
  background: rgba(56, 189, 248, 0.3);
  border-color: var(--accent-cyan);
  color: #ffffff;
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.4);
}

/* Quick Category Cards (Home Tab) */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
  margin-bottom: 2.5rem;
}

.cat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-silver);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.cat-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; width: 100%; height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
  opacity: 0;
  transition: var(--transition);
}

.cat-card:hover {
  transform: translateY(-4px);
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow), var(--shadow-ice);
}

.cat-card:hover::before {
  opacity: 1;
}

.cat-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.4rem;
}

.cat-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Section Header */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-silver);
}

.section-title-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.title-line {
  width: 4px;
  height: 24px;
  background: linear-gradient(to bottom, var(--accent-spark), var(--accent-blue));
  border-radius: 2px;
  box-shadow: 0 0 10px var(--accent-cyan);
}

.section-title {
  font-size: 1.5rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: 1px;
}

.sub-filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.chip-btn {
  background: rgba(15, 30, 56, 0.6);
  border: 1px solid var(--border-silver);
  color: var(--text-muted);
  padding: 0.4rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 20px;
  cursor: pointer;
  transition: var(--transition);
}

.chip-btn:hover {
  color: #ffffff;
  border-color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.15);
}

.chip-btn.active {
  background: linear-gradient(135deg, var(--accent-blue), #0369a1);
  color: #ffffff;
  border-color: var(--accent-spark);
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.35);
}

/* Content Cards Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
}

.item-card {
  background: var(--bg-card);
  border: 1px solid var(--border-silver);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  backdrop-filter: blur(10px);
}

.item-card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
  background: var(--bg-card-hover);
}

.item-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  gap: 0.5rem;
}

.item-name {
  font-size: 1.1rem;
  font-weight: 700;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.item-content {
  font-size: 0.88rem;
  color: var(--text-muted);
  white-space: pre-line;
  margin-bottom: 1rem;
  line-height: 1.5;
  max-height: 240px;
  overflow-y: auto;
  padding-right: 4px;
}

.item-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.75rem;
  border-top: 1px dashed rgba(224, 242, 254, 0.1);
  font-size: 0.8rem;
  color: var(--text-dim);
}

.btn-detail {
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: var(--accent-spark);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.btn-detail:hover {
  background: var(--accent-blue);
  color: #ffffff;
  border-color: var(--accent-spark);
  box-shadow: 0 0 10px rgba(56, 189, 248, 0.4);
}

/* Detail Modal */
.modal-backdrop {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(2, 6, 14, 0.85);
  backdrop-filter: blur(12px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}

.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.modal-box {
  background: #0b1527;
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-lg);
  max-width: 680px;
  width: 100%;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-ice), 0 0 40px rgba(56, 189, 248, 0.3);
  transform: scale(0.95);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  overflow: hidden;
}

.modal-backdrop.open .modal-box {
  transform: scale(1);
}

.modal-header {
  padding: 1.25rem 1.5rem;
  background: rgba(15, 30, 56, 0.9);
  border-bottom: 1px solid var(--border-silver);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: #ffffff;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.btn-close {
  background: transparent;
  border: 1px solid var(--border-silver);
  color: var(--text-muted);
  font-size: 0.85rem;
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition);
}

.btn-close:hover {
  color: #ffffff;
  border-color: var(--accent-cyan);
}

.modal-body {
  padding: 1.5rem;
  overflow-y: auto;
  color: var(--text-main);
  font-size: 0.92rem;
  line-height: 1.7;
}

.modal-body pre {
  font-family: inherit;
  white-space: pre-wrap;
  word-break: break-word;
}

.modal-footer {
  padding: 1rem 1.5rem;
  background: rgba(10, 20, 38, 0.8);
  border-top: 1px solid var(--border-silver);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
}

.btn-copy {
  background: linear-gradient(135deg, #0284c7, #38bdf8);
  border: 1px solid #e0f2fe;
  color: #ffffff;
  padding: 6px 16px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  transition: var(--transition);
}

.btn-copy:hover {
  box-shadow: 0 0 15px rgba(56, 189, 248, 0.5);
  transform: translateY(-1px);
}

/* Footer */
.footer {
  text-align: center;
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--border-silver);
  color: var(--text-dim);
  font-size: 0.85rem;
  background: rgba(5, 11, 20, 0.95);
  margin-top: 4rem;
}

.footer-banner img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-silver);
  transition: var(--transition);
}

.footer-banner img:hover {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.4);
}

/* Toast notification */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: rgba(2, 132, 199, 0.95);
  color: #ffffff;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--accent-spark);
  box-shadow: 0 0 20px rgba(56, 189, 248, 0.5);
  font-size: 0.88rem;
  font-weight: 600;
  z-index: 3000;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.3s ease;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* Responsive adjustments */
@media (max-width: 992px) {
  .nav-container {
    flex-wrap: wrap;
  }
  .nav-links {
    order: 3;
    width: 100%;
    overflow-x: auto;
    padding-bottom: 0.5rem;
  }
  .search-box {
    width: 200px;
  }
  .hero-title {
    font-size: 1.8rem;
  }
}

@media (max-width: 576px) {
  .hero-overlay {
    padding: 1.25rem;
  }
  .hero-title {
    font-size: 1.4rem;
  }
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  .cards-grid {
    grid-template-columns: 1fr;
  }
}