/* Dark mode relies on CSS variables from theme-tet.css */
html.dark { color-scheme: dark; }

html.dark body {
  background: var(--bg-gradient);
  color: var(--text);
}

html.dark input,
html.dark textarea,
html.dark select {
  background: var(--surface-strong);
  color: var(--text);
  border-color: var(--border);
}

html.dark .nav-overlay { background: var(--drawer-overlay); }
body,
.site-header,
.site-footer,
.card,
.accordion,
.sidebar,
.info-card,
.stat-card,
.highlight-card,
.intro-panel {
  background: #111827 !important;
  color: #eef2ff !important;
  border-color: transparent !important;
  box-shadow: none !important;
}
.card a,
.card h2,
.card h3,
h1, h2, h3, h4, h5, h6 {
  color: #f8fafc !important;
}
.card a:hover,
a:hover {
  color: #fbbf24 !important;
}
.card p { color: #e2e8f0 !important; }
.categories .card a { color: #e2e8f0 !important; }
.accordion-title,
.accordion-content { color: #e2e8f0 !important; }
body {
  background: #111827 !important;
  background-image:
    linear-gradient(rgba(148,163,184,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148,163,184,0.08) 1px, transparent 1px) !important;
  background-size: 32px 32px !important;
}
a {
  color: #f8fafc !important;
}
body.auth-page {
  background: radial-gradient(circle at 20% 20%, rgba(239, 68, 68, 0.25), transparent 55%),
    radial-gradient(circle at 80% 0%, rgba(251, 191, 36, 0.18), transparent 55%),
    linear-gradient(135deg, #3b0b0b, #160404 55%, #3b0b0b) !important;
  color: #fef2f2 !important;
}
body.auth-page::before,
body.auth-page::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
body.auth-page::before {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.12) 1px, transparent 1px);
  background-size: 42px 42px;
  opacity: 0.28;
}
body.auth-page::after {
  background-image:
    linear-gradient(120deg, rgba(251, 191, 36, 0.3), transparent 45%, rgba(239, 68, 68, 0.28)),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200' viewBox='0 0 200 200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='0.05'/%3E%3C/svg%3E");
  background-size: 200% 100%, 200px 200px;
  opacity: 0.32;
  animation: scanline 12s linear infinite;
  transform: translateX(-30%);
}

/* Slightly stronger curved strokes in dark mode for contrast */
.auth-page-wrapper::before {
  opacity: 0.34 !important;
}
body.auth-page > * {
  position: relative;
  z-index: 1;
}
main { background: transparent !important; }
a,
.tags a { color: #9dd0ff !important; }
.main-nav a { color: #f1f5f9 !important; }
html.dark body:not(.auth-page) .site-header {
  background: transparent !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08) !important;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35) !important;
  -webkit-backdrop-filter: blur(8px) !important;
  backdrop-filter: blur(8px) !important;
}
html.dark body:not(.auth-page) .site-header .container {
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
}

html.dark .site-header {
  background: rgba(17,24,39,0.92) !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08) !important;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35) !important;
}
html.dark .site-header .container {
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
}
html.dark .site-header .main-nav a {
  border-bottom: none !important;
}
html.dark .site-header .main-nav a::after {
  display: block !important;
}
.site-header::before,
.site-header::after {
  display: none !important;
}
.site-header .btn { background: #2563eb !important; box-shadow: none !important; }
.site-header button { background: #111827 !important; color: #f1f5f9 !important; border-color: #2b3a52 !important; }
.header-info {
  border: none !important;
  box-shadow: none !important;
}
.card,
.accordion,
.sidebar,
.info-card,
.stat-card,
.highlight-card {
  background: #0f172a !important;
  box-shadow: 0 12px 28px rgba(0,0,0,0.35) !important;
  border-color: #2b3a52 !important;
}
.sidebar {
  border: 1px solid #2b3a52 !important;
}
.sidebar h3 { color: #ffffff !important; }
.sidebar a { color: #dbeafe !important; }
.sidebar a:hover { color: #93c5fd !important; }
.sidebar ul li { color: #f1f5f9 !important; }
.accordion-item { border-color: #2b3a52 !important; }
.accordion-title { color: #f1f5f9 !important; }
.accordion-content { color: #d1d5db !important; }
.site-header { border-bottom: none !important; }
/* Restore subtle divider in dark mode so header không bị trống cạnh */
html.dark .site-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.55) !important;
  box-shadow:
    0 1px 0 rgba(0, 0, 0, 0.45),
    0 1px 0 rgba(255, 255, 255, 0.28) inset;
}
.site-footer {
  background: linear-gradient(135deg, #0b1220, #0f172a 55%, #111827) !important;
  color: #e2e8f0 !important;
  box-shadow: none !important;
}
.intro-dark { background: #111827 !important; }
.intro-dark::before {
  opacity: 0.5 !important;
  background-image:
    linear-gradient(rgba(148,163,184,0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(148,163,184,0.07) 1px, transparent 1px) !important;
  background-size: 32px 32px !important;
}
.section-head h2 { color: #ffffff !important; }
.section-head p { color: #dbeafe !important; }
.section-line { filter: brightness(1.2); }
.btn { background: #2563eb !important; box-shadow: none !important; }
.btn-secondary { background: #0f172a !important; color: #f1f5f9 !important; border: 1px solid #2b3a52 !important; }
.moment-card, .highlight-card, .card, .info-card, .stat-card { border-color: transparent !important; }
.hero { color: #fff !important; }
.hero-badge { background: rgba(148,163,184,0.18) !important; border-color: rgba(148,163,184,0.4) !important; }
.moment-card span { background: rgba(2,6,23,0.75) !important; }
/* Keep logos unchanged across themes */
.logo img,
.drawer-logo {
  filter: none !important;
  mix-blend-mode: normal !important;
  background: rgba(255, 255, 255, 0.94) !important;
  border: 1px solid rgba(255, 255, 255, 0.24) !important;
  border-radius: 12px !important;
  padding: 4px !important;
  box-shadow: 0 6px 16px rgba(0,0,0,0.28) !important;
  height: 44px;
  width: auto;
  object-fit: contain;
}

.site-footer img {
  filter: none !important;
  mix-blend-mode: normal !important;
  background: rgba(255, 255, 255, 0.94) !important;
  border: 1px solid rgba(255, 255, 255, 0.24) !important;
  border-radius: 12px !important;
  padding: 4px !important;
  box-shadow: 0 6px 16px rgba(0,0,0,0.28) !important;
  height: 36px;
  width: 36px;
  object-fit: contain;
}

body.auth-page .logo img {
  height: 36px;
  padding: 3px !important;
}

body.auth-page .footer-logos img {
  height: 30px;
  width: 30px;
  padding: 3px !important;
}
.footer-logos {
  background: rgba(255, 255, 255, 0.06) !important;
  border: 1px solid rgba(255, 255, 255, 0.14) !important;
  border-radius: 16px !important;
}
.logo span {
  text-shadow: none !important;
}
.logo-slogan {
  color: #e5e7eb !important;
  text-shadow: 0 0 6px rgba(255, 255, 255, 0.22) !important;
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.42);
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.36);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}
.logo-slogan.slogan-alt {
  color: #7c2d12 !important;
  background: rgba(251, 191, 36, 0.38);
  border: 1px solid rgba(251, 191, 36, 0.8);
  box-shadow: 0 8px 22px rgba(251, 191, 36, 0.45);
  text-shadow: 0 0 1px rgba(255, 255, 255, 0.65),
    0 0 12px rgba(251, 191, 36, 0.95),
    0 0 26px rgba(251, 191, 36, 0.78) !important;
  font-weight: 800;
}

/* Keep Tet auth header/nav matched in dark mode */
body.auth-page .site-header {
  background: transparent !important;
  box-shadow: none !important;
  border-bottom: none !important;
}
body.auth-page .logo,
body.auth-page .main-nav a,
body.auth-page .main-nav .btn,
body.auth-page .mobile-menu-toggle {
  color: rgba(255, 255, 255, 0.9) !important;
}
body.auth-page .main-nav a:hover { color: #fbbf24 !important; }
body.auth-page .header-info {
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  padding: 0 !important;
  border-radius: 0 !important;
  color: #fff !important;
}
body.auth-page .header-info .header-meta { color: rgba(255, 255, 255, 0.65) !important; }
body.auth-page .main-nav a::after { background: #fbbf24 !important; }

body.home .site-header {
  background: transparent !important;
  border-bottom: none !important;
  box-shadow: none !important;
}

/* Theme switcher colors in dark mode */
.theme-switch .slider { background: #0f172a !important; }
.theme-switch input:checked + .slider { background: #00a6ff !important; }
.theme-switch .slider:before { box-shadow: inset 8px -4px 0 0 #fff !important; }
.theme-switch input:checked + .slider:before { box-shadow: inset 15px -4px 0 15px #ffcf48 !important; }
.theme-switch .star { background: #e5e7eb !important; }

.nav-overlay { background: rgba(0, 0, 0, 0.62); }

.drawer-close {
  background: #111827 !important;
  border-color: #1f2937 !important;
  color: #e5e7eb !important;
}

.main-nav .header-info {
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
  color: #f1f5f9 !important;
}
.main-nav .header-info .header-meta { color: #94a3b8 !important; }
.main-nav .header-info .header-weather { color: #e2e8f0 !important; }

html.dark body:not(.auth-page) .main-nav {
  background: transparent !important;
  border-left: none !important;
  box-shadow: none !important;
}
html.dark body:not(.auth-page) .main-nav .drawer-header {
  background: transparent !important;
  border-bottom: none !important;
}
html.dark body:not(.auth-page) .nav-overlay {
  background: rgba(32, 18, 16, 0.9) !important;
}

@media (max-width: 1024px) {
  /* Keep the drawer solid in dark mode, independent of page backgrounds */
  .main-nav {
    background: linear-gradient(180deg, #2a0f0f 0%, #2f1111 100%) !important;
    border-left: 1px solid rgba(255, 255, 255, 0.12) !important;
    box-shadow: -12px 0 36px rgba(0,0,0,0.55) !important;
    height: 100vh;
  }
  /* Override the transparent desktop rule when on mobile */
  html.dark body:not(.auth-page) .main-nav {
    background: linear-gradient(180deg, #0b1933 0%, #0d2248 100%) !important;
    border-left: 1px solid rgba(59, 130, 246, 0.35) !important;
    box-shadow: -16px 0 40px rgba(0,0,0,0.6) !important;
  }
  html.dark body.menu-open:not(.auth-page) .nav-overlay {
    background: rgba(4, 10, 20, 0.92) !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
  }
  html.dark body:not(.auth-page) .main-nav .drawer-header {
    background: rgba(11, 25, 51, 0.95) !important;
    border-bottom: 1px solid rgba(59, 130, 246, 0.35) !important;
  }
  html.dark body:not(.auth-page) .main-nav a {
    color: #e5edff !important;
    border-bottom: 1px solid rgba(148, 163, 184, 0.35) !important;
  }
  .drawer-label { color: #f8fafc !important; }
  .drawer-sub { color: #94a3b8 !important; }
  .drawer-logo {
    background: #fff !important;
    border: 1px solid #e5e7eb !important;
    box-shadow: 0 6px 16px rgba(0,0,0,0.25) !important;
    filter: none !important;
  }
  .main-nav a {
    color: #e2e8f0 !important;
    border-bottom: 1px solid #1f2937 !important;
  }
  .main-nav .btn {
    background: linear-gradient(90deg, #3b82f6, #2563eb) !important;
    color: #fff !important;
    box-shadow: 0 12px 28px rgba(37, 99, 235, 0.35) !important;
    border: 1px solid #1f2937 !important;
  }
}

/* Align footer with Tet theme on auth pages (dark mode) */
body.auth-page .site-footer {
  background: rgba(0, 0, 0, 0.2) !important;
  border-top: 1px solid rgba(255, 255, 255, 0.12) !important;
  box-shadow: none !important;
  color: #fef3c7 !important;
}
body.auth-page .site-footer a { color: #fbbf24 !important; }
body.auth-page .site-footer a:hover { color: #fde68a !important; }
body.auth-page .footer-title,
body.auth-page .footer-group h4,
body.auth-page .footer-credit { color: #fcd34d !important; }
body.auth-page .footer-brand p,
body.auth-page .footer-group li,
body.auth-page .footer-bottom { color: rgba(255, 255, 255, 0.82) !important; }
body.auth-page .footer-divider {
  background: linear-gradient(90deg, transparent, rgba(251, 191, 36, 0.75), transparent) !important;
}
input, textarea, select {
  background: #0b1220 !important;
  color: #f1f5f9 !important;
  border: 1px solid #334155 !important;
}
input::placeholder, textarea::placeholder {
  color: #94a3b8 !important;
}
.alert.success { background: #134e4a !important; color: #a7f3d0 !important; }
.alert.error { background: #7f1d1d !important; color: #fee2e2 !important; }

/* Improve long-text readability in dark mode */
p { color: #e2e8f0 !important; }
strong { color: #ffffff !important; }

/* Tags pills in dark mode */
.tags a {
  background: #1f2a44 !important;
  color: #f1f5f9 !important;
  border: 1px solid #334155 !important;
}
.tags a:hover {
  background: #24324a !important;
  color: #f8fafc !important;
}

/* Footer theme in dark mode */
.site-footer a { color: #93c5fd !important; }
.site-footer a:hover { color: #bfdbfe !important; }
.footer-title,
.footer-group h4,
.footer-credit { color: #93c5fd !important; }
.footer-brand p,
.footer-group li,
.footer-bottom { color: #cbd5e1 !important; }
.footer-divider {
  background: linear-gradient(90deg, transparent, rgba(147, 197, 253, 0.7), transparent) !important;
}

/* Steps in dark mode */
.steps li {
  background: #0f172a !important;
  color: #f1f5f9 !important;
  border: 1px solid #2b3a52 !important;
}

/* Tet theme alignment in dark mode */
html.dark body.tet-binh-ngo .site-header {
  background: transparent !important;
  border-bottom: 1px solid rgba(251, 191, 36, 0.2) !important;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.35) !important;
  -webkit-backdrop-filter: blur(10px) !important;
  backdrop-filter: blur(10px) !important;
}
html.dark body.tet-binh-ngo .site-header .container {
  background: transparent !important;
  border: none !important;
  box-shadow: none !important;
}
html.dark body.tet-binh-ngo .logo span,
html.dark body.tet-binh-ngo .main-nav a,
html.dark body.tet-binh-ngo .main-nav .drawer-label,
html.dark body.tet-binh-ngo .main-nav .drawer-sub,
html.dark body.tet-binh-ngo .mobile-menu-toggle {
  color: #fffbeb !important;
  text-shadow: none !important;
}
html.dark body.tet-binh-ngo .mobile-menu-toggle {
  background: rgba(0, 0, 0, 0.76) !important;
  border: 1px solid rgba(255, 255, 255, 0.12) !important;
  border-radius: 12px !important;
  box-shadow: 0 10px 26px rgba(0, 0, 0, 0.35) !important;
  padding: 0.3em 0.4em !important;
}
html.dark body.tet-binh-ngo .main-nav a::after { background: #fbbf24 !important; }
html.dark body.tet-binh-ngo .header-info {
  background: rgba(0, 0, 0, 0.35) !important;
  border: 1px solid rgba(251, 191, 36, 0.2) !important;
  color: #fffbeb !important;
}
html.dark body.tet-binh-ngo .header-info .header-meta { color: rgba(255, 251, 235, 0.75) !important; }
html.dark body.tet-binh-ngo .header-info #header-time,
html.dark body.tet-binh-ngo .header-info #header-date,
html.dark body.tet-binh-ngo .header-info #header-temp,
html.dark body.tet-binh-ngo .header-info .header-weather {
  color: #fffbeb !important;
}

/* Keep Tet auth palette identical across light/dark */
body.auth-page .auth-promo,
.tet-binh-ngo .auth-promo {
  background: linear-gradient(150deg, rgba(92, 28, 5, 0.7), rgba(180, 83, 9, 0.55)),
    radial-gradient(circle at 20% 20%, rgba(251, 191, 36, 0.25), transparent 40%),
    rgba(35, 12, 12, 0.65) !important;
  border-color: rgba(251, 191, 36, 0.35) !important;
  color: #fffbeb !important;
}

body.auth-page .auth-card,
.tet-binh-ngo .auth-card {
  background: linear-gradient(160deg, rgba(16, 12, 8, 0.92), rgba(103, 41, 13, 0.7)) !important;
  border: 1px solid rgba(251, 191, 36, 0.25) !important;
  color: #fff !important;
}

body.auth-page .auth-form input,
.tet-binh-ngo .auth-form input {
  background: rgba(0, 0, 0, 0.35) !important;
  border: 1px solid rgba(255, 255, 255, 0.1) !important;
  color: #fff !important;
}

body.auth-page .auth-form input:focus,
.tet-binh-ngo .auth-form input:focus {
  border-color: #fbbf24 !important;
  box-shadow: 0 0 0 4px rgba(251, 191, 36, 0.1) !important;
  background: rgba(0, 0, 0, 0.5) !important;
}

body.auth-page .auth-form input::placeholder,
.tet-binh-ngo .auth-form input::placeholder {
  color: rgba(255, 255, 255, 0.3) !important;
}

body.auth-page .btn-tet,
.tet-binh-ngo .btn-tet {
  background: linear-gradient(90deg, #3b82f6, #2563eb) !important;
  box-shadow: 0 12px 28px rgba(37, 99, 235, 0.35) !important;
  border: 1px solid rgba(255, 255, 255, 0.1) !important;
}

body.auth-page .btn-tet:hover,
.tet-binh-ngo .btn-tet:hover {
  background: linear-gradient(90deg, #2563eb, #1d4ed8) !important;
}

body.auth-page .auth-chip,
.tet-binh-ngo .auth-chip,
body.auth-page .auth-highlights span,
.tet-binh-ngo .auth-highlights span {
  background: rgba(0, 0, 0, 0.25) !important;
  border-color: rgba(255, 255, 255, 0.08) !important;
  color: rgba(255, 255, 255, 0.86) !important;
}