/* ═══════════════════════════════════════════════
   🌊 OCEAN DESIGN SYSTEM v2.0
   Liquid Glass + Bento Grid + Spatial UI
   ═══════════════════════════════════════════════ */

/* ── CSS Design Tokens ── */
:root {
  /* Ocean Palette */
  --ocean-abyss: #020617;
  --ocean-deep: #001133;
  --ocean-mid: #001a4d;
  --ocean-surface: #002966;
  --coral-primary: #00b4d8;
  --coral-glow: #48cae4;
  --coral-bright: #90e0ef;
  --gold-warm: #f0c060;
  --gold-light: #f7d98c;
  --foam-white: #e0f7fa;
  --profit-green: #2dd4bf;
  --danger-red: #ff6b6b;

  /* Glass Surfaces */
  --glass-bg: rgba(0, 17, 51, 0.55);
  --glass-bg-hover: rgba(0, 26, 77, 0.65);
  --glass-border: rgba(0, 180, 216, 0.15);
  --glass-border-hover: rgba(72, 202, 228, 0.35);
  --glass-blur: 18px;
  --glass-saturate: 1.2;

  /* Depth Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 24px rgba(0, 180, 216, 0.08);
  --shadow-lg: 0 8px 48px rgba(0, 180, 216, 0.12);
  --shadow-glow: 0 0 30px rgba(72, 202, 228, 0.15);

  /* Typography */
  --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;

  /* Radii */
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --radius-2xl: 2rem;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--ocean-abyss);
  color: var(--foam-white);
  min-height: 100vh;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--ocean-deep); }
::-webkit-scrollbar-thumb { background: var(--coral-primary); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--coral-glow); }

/* ── Selection ── */
::selection { background: rgba(0, 180, 216, 0.3); color: #fff; }

/* ── Ocean Video Background ── */
#ocean-video-bg {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  z-index: -2;
  opacity: 0.85;
}

#ocean-gradient-overlay {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: -1;
  background: linear-gradient(
    180deg,
    rgba(2, 6, 23, 0.3) 0%,
    rgba(0, 17, 51, 0.5) 40%,
    rgba(0, 26, 77, 0.6) 100%
  );
}

/* ═══ GLASS COMPONENTS ═══ */

/* Glass Card — Liquid Glass style */
.ocean-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
}

.ocean-card::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(72, 202, 228, 0.04), transparent);
  transition: left 0.6s var(--ease-out);
}

.ocean-card:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.ocean-card:hover::before {
  left: 100%;
}

/* Glass Button — Neon glow */
.ocean-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.5rem;
  background: rgba(0, 180, 216, 0.12);
  border: 1px solid rgba(0, 180, 216, 0.25);
  border-radius: var(--radius-md);
  color: var(--coral-glow);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.ocean-btn:hover {
  background: rgba(0, 180, 216, 0.2);
  border-color: var(--coral-glow);
  box-shadow: 0 0 20px rgba(0, 180, 216, 0.2);
  color: #fff;
}

.ocean-btn:active {
  transform: scale(0.97);
}

/* Primary Button */
.ocean-btn-primary {
  background: linear-gradient(135deg, rgba(0, 180, 216, 0.3), rgba(72, 202, 228, 0.2));
  border-color: var(--coral-primary);
  color: #fff;
}

/* ═══ BENTO GRID ═══ */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 180px;
  gap: var(--space-lg);
  width: 100%;
  max-width: 1100px;
}

.bento-grid > * { min-height: 0; }

/* Span helpers */
.bento-span-2 { grid-column: span 2; }
.bento-span-3 { grid-column: span 3; }
.bento-span-4 { grid-column: span 4; }
.bento-row-2 { grid-row: span 2; }
.bento-row-3 { grid-row: span 3; }

@media (max-width: 768px) {
  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 150px;
  }
  .bento-span-2, .bento-span-3, .bento-span-4 { grid-column: span 2; }
}

@media (max-width: 480px) {
  .bento-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: 140px;
  }
  .bento-span-2, .bento-span-3, .bento-span-4 { grid-column: span 1; }
  .bento-row-2, .bento-row-3 { grid-row: span 1; }
}

/* ═══ TYPOGRAPHY ═══ */
.ocean-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  background: linear-gradient(135deg, var(--coral-glow), var(--foam-white) 40%, var(--gold-warm));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.ocean-subtitle {
  color: rgba(148, 163, 184, 0.8);
  font-size: 1.05rem;
  max-width: 600px;
  text-align: center;
  line-height: 1.7;
}

/* ═══ ANIMATIONS ═══ */
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 10px rgba(0, 180, 216, 0.1); }
  50% { box-shadow: 0 0 25px rgba(72, 202, 228, 0.25); }
}

@keyframes shimmer {
  0% { background-position: -200% center; }
  100% { background-position: 200% center; }
}

.ocean-shimmer {
  background: linear-gradient(90deg, transparent, rgba(72, 202, 228, 0.08), transparent);
  background-size: 200% 100%;
  animation: shimmer 3s infinite;
}

/* ── Utility Classes ── */
.ocean-hidden { display: none !important; }
.ocean-flex-center { display: flex; align-items: center; justify-content: center; }
.ocean-text-center { text-align: center; }
.ocean-relative { position: relative; }
.ocean-z-1 { z-index: 1; }
.ocean-z-10 { z-index: 10; }

/* ═══════════════════════════════════════════════
   🌊 SUB-SITE CLEANUP — hide old nav elements
   These rules hide the original nav/banner from
   tools, english, news so the ocean-shell nav
   is the only visible navigation.
   ═══════════════════════════════════════════════ */

/* Tools: hide old banner and internal nav */
body > header,
body > nav:not(#ocean-nav),
header[class],
.banner,
[class*="banner"],
[class*="top-bar"],
a[href="/"]:not(#ocean-nav a):not(.ocean-card):not(.ocean-btn),
a[href*="小丹智能"] {
  display: none !important;
}

/* Keep the ocean nav visible */
#ocean-nav,
#ocean-nav * {
  display: flex !important;
}

/* English: hide old banner and sign-in popup */
[class*="signin"],
[class*="签到"] {
  display: none !important;
}

/* Ensure body respects ocean background */
body > div:first-child:not(#ocean-video-bg):not(#ocean-gradient-overlay):not(#ocean-nav) {
  position: relative;
  z-index: 1;
}

/* Cookies dialog - push to bottom */
[class*="cookie"], [id*="cookie"] {
  z-index: 50 !important;
}