/* ===== 熬夜选手bbb Blog ===== */

:root {
  --bg: #f0f2f5;
  --on-surface: #1a1a2e;
  --on-surface-variant: #555577;
  --text-muted: #888899;
  --surface: rgba(255,255,255,0.7);
  --surface-light: rgba(0,0,0,0.04);
  --surface-container: rgba(0,0,0,0.06);
  --surface-container-low: rgba(0,0,0,0.03);
  --outline-variant: rgba(0,0,0,0.1);
  --primary: #4a5ae8;
  --secondary: #8b5cf6;
  --on-primary: #ffffff;
  --nav-bg: rgba(255,255,255,0.82);
  --footer-bg: rgba(240,242,245,0.9);
  --card-glass-bg: rgba(255,255,255,0.6);
  --card-glass-border: rgba(0,0,0,0.08);
  --card-glass-hover: rgba(255,255,255,0.85);
  --tag-chip-bg: rgba(0,0,0,0.06);
  --tag-chip-color: #555577;
  --blockquote-bg: rgba(74,90,232,0.06);
  --blockquote-color: #555577;
  --prose-h2: #1a1a2e;
  --prose-p: #444466;
  --prose-lead: #1a1a2e;
  --input-bg: rgba(0,0,0,0.04);
  --input-border: rgba(0,0,0,0.15);
  --input-color: #1a1a2e;
  --input-placeholder: rgba(0,0,0,0.35);
}

.dark {
  --bg: #0a0a1a;
  --on-surface: #e0e0f0;
  --on-surface-variant: #b0b0d0;
  --text-muted: #8888aa;
  --surface: rgba(15,15,35,0.6);
  --surface-light: rgba(255,255,255,0.06);
  --surface-container: rgba(255,255,255,0.08);
  --surface-container-low: rgba(255,255,255,0.04);
  --outline-variant: rgba(255,255,255,0.1);
  --primary: #6b7cff;
  --secondary: #b48eff;
  --on-primary: #ffffff;
  --nav-bg: rgba(15,15,35,0.75);
  --footer-bg: rgba(10,10,26,0.85);
  --card-glass-bg: rgba(255,255,255,0.06);
  --card-glass-border: rgba(255,255,255,0.08);
  --card-glass-hover: rgba(255,255,255,0.1);
  --tag-chip-bg: rgba(255,255,255,0.08);
  --tag-chip-color: #b0b0d0;
  --blockquote-bg: rgba(107,124,255,0.08);
  --blockquote-color: #c0c0d8;
  --prose-h2: #e8e8ff;
  --prose-p: #c0c0d8;
  --prose-lead: #e0e0f0;
  --input-bg: rgba(255,255,255,0.06);
  --input-border: rgba(255,255,255,0.12);
  --input-color: #e0e0f0;
  --input-placeholder: rgba(255,255,255,0.3);
}

body {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--bg);
  font-family: 'Inter', sans-serif;
  color: var(--on-surface);
  transition: background-color 0.3s ease, color 0.3s ease;
}

::selection {
  background: rgba(60, 81, 194, 0.4);
  color: #fff;
}

/* --- Glass Nav --- */
.glass-nav {
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: var(--nav-bg) !important;
  border: 1px solid var(--outline-variant);
  transition: background 0.3s ease, border-color 0.3s ease;
}

/* --- Scroll Progress --- */
.scroll-progress {
  height: 3px;
  background: linear-gradient(90deg, #6b7cff, #b48eff);
  width: 0%;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 60;
  transition: width 0.1s ease;
}

/* --- Floating Animation --- */
.floating {
  animation: float 6s ease-in-out infinite;
}

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

/* --- Cards --- */
.article-card {
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.article-card:active {
  transform: scale(0.98);
}

.card-glass {
  background: var(--card-glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--card-glass-border);
  transition: background 0.3s ease, border-color 0.3s ease;
}

.card-glass:hover {
  background: var(--card-glass-hover);
  border-color: var(--primary);
}

/* --- Message Card --- */
.message-card {
  transition: all 0.3s ease;
}

.message-card:active {
  transform: scale(0.98);
}

/* --- Emoji Button --- */
.emoji-btn {
  transition: all 0.2s;
  cursor: pointer;
}

.emoji-btn:hover {
  transform: scale(1.2);
}

/* --- Tag Chip --- */
.tag-chip {
  transition: all 0.2s ease;
  cursor: pointer;
  background: var(--tag-chip-bg);
  color: var(--tag-chip-color);
}

.tag-chip:hover {
  background: rgba(107, 124, 255, 0.3);
  color: #fff;
}

/* --- Prose (Article Body) --- */
.prose h2 {
  font-family: 'Hanken Grotesk', sans-serif;
  font-size: 24px;
  font-weight: 600;
  color: var(--prose-h2);
  margin: 32px 0 12px;
}

.prose p {
  font-size: 17px;
  line-height: 1.9;
  color: var(--prose-p);
  margin-bottom: 18px;
}

.prose blockquote {
  border-left: 3px solid var(--primary);
  padding: 12px 18px;
  margin: 20px 0;
  background: var(--blockquote-bg);
  border-radius: 0 8px 8px 0;
  font-style: italic;
  color: var(--blockquote-color);
  font-size: 16px;
  transition: background 0.3s ease, color 0.3s ease;
}

/* --- Footer --- */
.footer-glass {
  background: var(--footer-bg);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--outline-variant);
  transition: background 0.3s ease, border-color 0.3s ease;
}

/* --- Input --- */
.input-dark {
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  color: var(--input-color);
  transition: background 0.3s ease, border-color 0.3s ease, color 0.3s ease;
}

.input-dark::placeholder {
  color: var(--input-placeholder);
}

.input-dark:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(107, 124, 255, 0.2);
}