/* ============================================================
   MAGE THEME — Liquid Glass Style
   Dark blue/black · Frosted glass cards · Fluid layout
   ============================================================ */

/* ── 1. Variables ─────────────────────────────────────────── */
:root {
  /* Colors — twilight navy */
  --bg:          #111827;
  --bg2:         #1a2540;
  --text:        #e2ecff;
  --text-muted:  #8ba4cc;
  --accent:      #4f8ef7;
  --accent-2:    #7cb9ff;
  --accent-3:    #a5cfff;
  --link:        #7cb9ff;
  --border:      rgba(255,255,255,0.09);

  /* Glass — translucent navy */
  --glass-bg:    rgba(20,35,72,0.38);
  --glass-bg2:   rgba(20,35,72,0.56);
  --glass-blur:  blur(28px) saturate(170%);
  --glass-blur2: blur(44px) saturate(200%);
  --glass-border:1px solid rgba(120,170,255,0.13);
  --glass-shadow:0 8px 32px rgba(0,15,50,0.38),
                 0 2px 8px  rgba(0,15,50,0.22);
  --glass-shadow-hover: 0 18px 52px rgba(0,20,70,0.52),
                        0 4px 18px rgba(79,142,247,0.22);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
               'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
  --font-size: 16px;
  --line-height: 1.8;

  /* Layout */
  --nav-h:      68px;
  --radius:     24px;  /* Increased from 20px for smoother look */
  --radius-sm:  12px;
  --radius-lg:  32px;
  --container:  1100px;

  /* Transitions */
  --ease: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-std: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── 2. Reset & Base ──────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: var(--font-size); }

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(120,170,255,0.3);
  border-radius: 99px; /* Rounded Scrollbar */
  border: 2px solid transparent;
  background-clip: content-box;
}
::-webkit-scrollbar-thumb:hover { background-color: rgba(120,170,255,0.6); }

/* Selection */
::selection { background: rgba(79,158,247,0.3); color: inherit; }

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: var(--line-height);
  min-height: 100vh;
  overflow-x: hidden;
}

a {
  color: var(--link);
  text-decoration: none;
  transition: color .2s var(--ease-std), opacity .2s;
}
a:hover { color: var(--accent); }

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-sm);
}

/* ── 3. Background Mesh & Blobs ───────────────────────────── */
.bg-layer {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background:
    radial-gradient(ellipse at 15% 10%, rgba(60,110,255,.20) 0%, transparent 52%),
    radial-gradient(ellipse at 85% 85%, rgba(20,70,200,.18) 0%, transparent 52%),
    radial-gradient(ellipse at 55% 45%, rgba(80,150,255,.10) 0%, transparent 48%),
    linear-gradient(160deg, #0f1623 0%, #141f35 50%, #111b2e 100%);
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: .55;
  animation: blobFloat 16s ease-in-out infinite alternate;
}
.blob-1 { width: 520px; height: 520px; background: rgba(50,100,240,.20); top: -100px; left: -80px; animation-delay: 0s; }
.blob-2 { width: 420px; height: 420px; background: rgba(79,142,247,.18); bottom: 5%; right: -80px; animation-delay: -6s; }
.blob-3 { width: 360px; height: 360px; background: rgba(120,180,255,.10); top: 40%; left: 40%; animation-delay: -12s; }

@keyframes blobFloat {
  0%   { transform: translate(0, 0) scale(1); }
  50%  { transform: translate(30px, -40px) scale(1.08); }
  100% { transform: translate(-20px, 20px) scale(0.95); }
}

/* ── 4. Glass Primitives ──────────────────────────────────── */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  box-shadow: var(--glass-shadow);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow .3s var(--ease-std), transform .3s var(--ease);
}
.glass-card:hover {
  box-shadow: var(--glass-shadow-hover);
}

/* ── 5. Navigation ────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 48px);
  max-width: 900px;
  z-index: 1000;
  background: rgba(15,22,45,0.52);
  backdrop-filter: var(--glass-blur2);
  -webkit-backdrop-filter: var(--glass-blur2);
  border: 1px solid rgba(79,142,247,0.22);
  border-radius: 999px;
  box-shadow: 0 4px 24px rgba(0,10,40,0.30),
              0 1px 0 rgba(255,255,255,0.07) inset,
              0 -1px 0 rgba(0,0,0,0.12) inset;
  transition: all .3s var(--ease-std);
}

.site-header.scrolled {
  background: rgba(15,22,45,0.72);
  box-shadow: 0 8px 40px rgba(0,10,40,0.42),
              0 1px 0 rgba(255,255,255,0.07) inset;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  height: var(--nav-h);
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text) !important;
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: .5px;
}
.logo-text {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  display: flex;
  align-items: center;
  position: relative;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: .96rem;
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--text-muted) !important;
  transition: all .25s var(--ease-std);
}

.nav-link i {
  margin-right: 8px;
  font-size: 0.95em;
  opacity: 0.8;
  transition: opacity .2s;
}

.nav-link:hover i {
  opacity: 1;
}

/* Hover: subtle glass fill + lift */
.nav-link:hover {
  background: rgba(255,255,255,0.06);
  color: var(--text) !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

/* Active: accent text + glowing dot */
.nav-link.active {
  color: var(--text) !important;
  background: rgba(255,255,255,0.09);
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: 0px;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 3px;
  background: var(--accent);
  border-radius: 3px 3px 0 0;
  box-shadow: 0 -2px 8px var(--accent);
}

/* Clear previous styles */
.nav-link::before { display: none; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all .25s var(--ease-std);
}

/* ── 6. Layout Container ──────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.site-main {
  padding-top: calc(var(--nav-h) + 32px);
  min-height: 100vh;
  animation: fadeInMain 0.8s var(--ease) forwards;
  opacity: 0;
}

@keyframes fadeInMain {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── 7. Hero Section ──────────────────────────────────────── */
.hero-section {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: radial-gradient(circle at center, #1b3a8a 0%, #0f172a 100%);
  margin-top: calc(var(--nav-h) * -1 - 32px);
  padding-top: calc(var(--nav-h) + 60px);
}

/* Light mode override for hero background handled in theme block or ensure specificity */
[data-theme="light"] .hero-section {
  background: radial-gradient(circle at center, #dceafe 0%, #eff6ff 100%);
}

[data-theme="light"] .hero-title {
  color: #1e3a8a; /* Dark blue text for contrast */
  text-shadow: 0 2px 10px rgba(147, 197, 253, 0.3);
}

[data-theme="light"] .hero-subtitle {
  color: #3b82f6;
}

[data-theme="light"] .btn-glass {
  background: rgba(255,255,255,0.6);
  border: 1px solid rgba(59,130,246,0.3);
  color: #1e40af !important;
  box-shadow: 0 4px 20px rgba(59,130,246,0.15);
}
[data-theme="light"] .btn-glass:hover {
  background: rgba(255,255,255,0.9);
  color: #1e3a8a !important;
  box-shadow: 0 10px 30px rgba(59,130,246,0.25);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background-image: 
    radial-gradient(at 10% 10%, rgba(79,142,247,0.15) 0px, transparent 50%),
    radial-gradient(at 90% 90%, rgba(124,58,237,0.1) 0px, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 640px;
  padding: 0 24px;
}

.hero-title {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 800;
  color: #fff;
  letter-spacing: -2px;
  line-height: 1.05;
  text-shadow: 0 2px 24px rgba(0,0,0,0.18);
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.4rem);
  color: rgba(255,255,255,.85);
  margin-bottom: 36px;
  font-weight: 400;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,.6);
  animation: bounceDown 2s infinite;
  z-index: 1;
}
@keyframes bounceDown {
  0%,100% { transform: translateX(-50%) translateY(0); }
  50%      { transform: translateX(-50%) translateY(8px); }
}

/* ── 8. Buttons ───────────────────────────────────────────── */
.btn-glass {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 32px;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 999px;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #fff !important;
  cursor: pointer;
  transition: all .3s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 4px 20px rgba(0,0,0,0.1), 0 1px 0 rgba(255,255,255,0.2) inset;
  position: relative;
  overflow: hidden;
}

.btn-glass::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0));
  opacity: 0;
  transition: opacity 0.3s;
}

.btn-glass:hover {
  background: rgba(255,255,255,0.25);
  transform: translateY(-3px) scale(1.02);
  border-color: rgba(255,255,255,0.6);
  box-shadow: 0 10px 30px rgba(79,142,247,0.25), 0 1px 0 rgba(255,255,255,0.4) inset;
}

.btn-glass:hover::before {
  opacity: 1;
}

.btn-glass:active {
  transform: translateY(-1px) scale(0.98);
}

.btn-glass-sm {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  background: rgba(59,130,246,.12);
  border: 1px solid rgba(59,130,246,.30);
  border-radius: 999px;
  font-size: .82rem;
  font-weight: 600;
  color: var(--accent-2) !important;
  transition: all .2s var(--ease);
}
.btn-glass-sm:hover {
  background: rgba(59,130,246,.22);
  transform: translateY(-1px);
}

/* ── 9. Posts Grid ────────────────────────────────────────── */
.posts-section {
  padding: 60px 24px;40px, 1fr));
  gap: 32px;
  perspective: 1000px;
}

/* ── 10. Post Card ────────────────────────────────────────── */
.post-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  cursor: pointer;
  transition: all .4s cubic-bezier(0.25, 0.8, 0.25, 1);
  will-change: transform, box-shadow;
}

.post-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--glass-shadow-hover);
}

[data-theme="light"] .post-card:hover {
  box-shadow: 0 20px 40px rgba(59,130,246,0.15), 0 5px 15px rgba(59,130,246,0.1);
}
.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 70%;
  background: linear-gradient(to bottom, var(--accent), var(--accent-3));
  border-radius: 4px;
}

.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

/* ── 10. Post Card ────────────────────────────────────────── */
.post-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  cursor: pointer;
  transition: all .35s var(--ease);
}
.post-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--glass-shadow-hover);
}

.post-card-cover {
  position: relative;
  height: 200px;
  background-size: cover;
  background-position: center;
  overflow: hidden;
  cursor: zoom-in;
  flex-shrink: 0;
}
.post-card-cover-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .3s;
}
.post-card-cover:hover .post-card-cover-overlay {
  background: rgba(0,0,0,.35);
}
.gallery-hint {
  white-space: nowrap;
  color: #fff;
  font-size: .9rem;
  font-weight: 600;
  opacity: 0;
  transform: translateY(8px);
  transition: all .3s var(--ease);
  padding: 8px 20px;
  background: rgba(255,255,255,.18);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,.4);
}
.post-card-cover:hover .gallery-hint {
  opacity: 1;
  transform: translateY(0);
}

.post-card-body {
  padding: 20px 22px 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.post-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
  font-size: .8rem;
  color: var(--text-muted);
}

.post-category a {
  color: var(--accent);
  font-weight: 600;
}

.post-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 10px;
}
.post-card-title a { color: var(--text) !important; }
.post-card-title a:hover { color: var(--accent) !important; }

.post-card-excerpt {
  font-size: .88rem;
  color: var(--text-muted);
  flex: 1;
  line-height: 1.6;
  margin-bottom: 16px;
}

.post-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

.post-tags { display: flex; flex-wrap: wrap; gap: 6px; }

.tag-chip {
  padding: 3px 10px;
  background: rgba(59,130,246,.12);
  border: 1px solid rgba(59,130,246,.25);
  border-radius: 999px;
  font-size: .75rem;
  color: var(--accent-2) !important;
  transition: all .2s;
}
.tag-chip:hover { background: rgba(59,130,246,.22); }

/* ── 11. Post Article ─────────────────────────────────────── */
.post-hero {
  height: 55vh;
  min-height: 340px;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: flex-end;
  position: relative;
  margin-top: calc(var(--nav-h) * -1 - 32px);
  padding-top: var(--nav-h);
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
  overflow: hidden;
}
.post-hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.65) 0%, rgba(0,0,0,.1) 60%, transparent 100%);
}
.post-hero-content {
  position: relative;
  z-index: 1;
  padding-bottom: 40px;
  color: #fff;
}
.post-hero-content .post-title { color: #fff; }

.post-breadcrumb {
  font-size: .82rem;
  color: var(--text-muted);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.post-hero-content .post-breadcrumb { color: rgba(255,255,255,.7); }

.post-title {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.5px;
  margin-bottom: 12px;
}

.post-meta-line {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: .85rem;
  color: var(--text-muted);
}
.post-hero-content .post-meta-line { color: rgba(255,255,255,.75); }

.post-layout {
  padding: 32px 24px 80px;
  max-width: 1080px;
  margin: 0 auto;
}

.post-header {
  padding: 32px 36px;
  margin-bottom: 28px;
}

.post-content-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: start;
}
/* 仅当 TOC 侧边栏存在时才启用双列 */
.post-content-wrap:has(.toc-panel) {
  grid-template-columns: 1fr 260px;
}

/* Flip order: article first, TOC second on desktop */
.post-article {
  grid-column: 1;
  grid-row: 1;
}
.toc-panel {
  grid-column: 2;
  grid-row: 1;
  position: sticky;
  top: calc(var(--nav-h) + 28px);
  max-height: calc(100vh - var(--nav-h) - 56px);
  overflow-y: auto;
  padding: 20px;
}

.post-article { padding: 36px 40px; }

/* Markdown content */
.post-body h1,.post-body h2,.post-body h3,
.post-body h4,.post-body h5,.post-body h6 {
  font-weight: 700;
  line-height: 1.3;
  margin: 2em 0 .6em;
  color: var(--text);
}
.post-body h2 { font-size: 1.5rem; padding-bottom: .4em; border-bottom: 1px solid rgba(79,142,247,.15); }
.post-body h3 { font-size: 1.2rem; }

.post-body p { margin: 1em 0; }

.post-body a { color: var(--link); text-decoration: underline; text-underline-offset: 3px; }
.post-body a:hover { color: var(--accent); }

.post-body img {
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 20px rgba(0,0,0,.12);
  margin: 1.5em auto;
  max-width: 100%;
}

.post-body blockquote {
  border-left: 3px solid var(--accent);
  background: rgba(59,130,246,.08);
  padding: 14px 20px;
  margin: 1.5em 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-muted);
  font-style: italic;
}

.post-body pre {
  background: rgba(6,12,28,.70);
  border: 1px solid rgba(79,142,247,.14);
  border-radius: var(--radius-sm);
  padding: 20px;
  overflow-x: auto;
  margin: 1.5em 0;
  font-family: var(--font-mono);
  font-size: .88rem;
  line-height: 1.65;
}

.post-body code {
  font-family: var(--font-mono);
  font-size: .88em;
  background: rgba(79,142,247,.10);
  padding: 2px 7px;
  border-radius: 6px;
  border: 1px solid rgba(79,142,247,.18);
}
.post-body pre code {
  background: none;
  padding: 0;
  border: none;
}

.post-body table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  margin: 1.5em 0;
  font-size: .9rem;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid rgba(79,142,247,.12);
}
.post-body th { background: rgba(79,142,247,.10); font-weight: 700; }
.post-body th,.post-body td {
  border-right: 1px solid rgba(79,142,247,.12);
  border-bottom: 1px solid rgba(79,142,247,.12);
  padding: 10px 14px;
}
.post-body th:last-child,.post-body td:last-child { border-right: none; }
.post-body tr:last-child td { border-bottom: none; }
.post-body tr:nth-child(even) td { background: rgba(79,142,247,.05); }


.post-body ul,.post-body ol { padding-left: 1.6em; margin: 1em 0; }
.post-body li { margin: .4em 0; }

/* TOC styling */
.toc-header {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: .82rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: .8px;
}
.toc-body ol { list-style: none; padding: 0; }
.toc-body li { margin: 4px 0; }
.toc-body a {
  font-size: .83rem;
  color: var(--text-muted) !important;
  display: block;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  transition: all .2s;
  border-left: 2px solid transparent;
}
.toc-body a:hover,
.toc-body a.active {
  color: var(--accent-2) !important;
  background: rgba(59,130,246,.10);
  border-left-color: var(--accent);
}
.toc-body .toc-level-2 { padding-left: 0; }
.toc-body .toc-level-3 a { padding-left: 20px; }

/* Post navigation */
.post-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid rgba(79,142,247,.12);
}
.post-nav-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 20px;
  color: var(--text) !important;
  transition: all .25s var(--ease);
}
.post-nav-item:hover { transform: translateY(-3px); }
.post-nav-label { font-size: .78rem; color: var(--text-muted); font-weight: 600; }
.post-nav-title { font-size: .9rem; font-weight: 600; }
/* 强制上一篇在左列、下一篇在右列，无论另一篇是否存在 */
.post-nav-prev { grid-column: 1; }
.post-nav-next { grid-column: 2; text-align: right; }

/* ── 12. Archive ──────────────────────────────────────────── */
.page-container { padding: 60px 24px; }
.page-header {
  padding: 32px 36px;
  margin-bottom: 28px;
}
.page-title {
  font-size: 2rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 6px;
}
.page-subtitle { color: var(--text-muted); }

.archive-list { padding: 32px 36px; }
.archive-year {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--accent);
  margin: 28px 0 12px;
  opacity: .7;
}
.archive-year:first-child { margin-top: 0; }
.archive-posts { list-style: none; }
.archive-item {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  border-bottom: 1px solid rgba(79,142,247,.08);
  transition: background .2s;
}
.archive-item:hover { background: rgba(79,142,247,.07); }
.archive-date {
  font-size: .82rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
  min-width: 48px;
}
.archive-title { font-weight: 500; flex: 1; }
.archive-cat a { font-size: .78rem; color: var(--accent); }

/* ── 13. Tag Cloud ────────────────────────────────────────── */
.tag-cloud {
  padding: 36px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
.tag-cloud-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 14px;
  background: var(--glass-bg);
  border: var(--glass-border);
  border-radius: 999px;
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: var(--glass-shadow);
  color: var(--text) !important;
  font-weight: 500;
  transition: all .25s var(--ease);
}
.tag-cloud-item:hover {
  background: rgba(79,142,247,.18);
  color: var(--accent-2) !important;
  transform: translateY(-3px);
  box-shadow: var(--glass-shadow-hover);
}
.tag-cloud-item sup { font-size: .65em; color: var(--text-muted); }

/* ── 14. Categories ───────────────────────────────────────── */
.category-list {
  padding: 24px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}
.category-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 20px;
  background: var(--glass-bg);
  border: var(--glass-border);
  border-radius: var(--radius-sm);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  color: var(--text) !important;
  font-weight: 600;
  transition: all .25s var(--ease);
}
.category-item:hover {
  background: rgba(79,142,247,.14);
  color: var(--accent-2) !important;
  transform: translateY(-3px);
}
.category-count {
  font-size: .78rem;
  color: var(--text-muted);
  background: rgba(79,142,247,.12);
  padding: 2px 8px;
  border-radius: 999px;
}

/* ── 15. Gallery Page ─────────────────────────────────────── */
.gallery-masonry {
  columns: 3 240px;
  gap: 16px;
  padding: 0;
}
.gallery-item {
  break-inside: avoid;
  margin-bottom: 16px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  position: relative;
  cursor: zoom-in;
  box-shadow: var(--glass-shadow);
  transition: all .3s var(--ease);
}
.gallery-item:hover { transform: scale(1.02); box-shadow: var(--glass-shadow-hover); }
.gallery-item img { width: 100%; display: block; transition: transform .4s var(--ease); }
.gallery-item:hover img { transform: scale(1.04); }
.gallery-item-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.6) 0%, transparent 60%);
  opacity: 0;
  transition: opacity .3s;
  display: flex;
  align-items: flex-end;
  padding: 16px;
}
.gallery-item:hover .gallery-item-overlay { opacity: 1; }
.gallery-item-title { color: #fff; font-size: .88rem; font-weight: 600; }

/* ── 16. Friends Page ─────────────────────────────────────── */
.friends-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
  margin-top: 0;
}
.friend-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  color: var(--text) !important;
  transition: all .3s var(--ease);
}
.friend-card:hover { transform: translateY(-5px); box-shadow: var(--glass-shadow-hover); }
.friend-avatar {
  width: 56px; height: 56px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 4px 12px rgba(0,0,0,.12);
  flex-shrink: 0;
}
.friend-avatar-placeholder {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.3rem;
  font-weight: 700;
  flex-shrink: 0;
}
.friend-info { display: flex; flex-direction: column; gap: 4px; overflow: hidden; }
.friend-name { font-weight: 700; }
.friend-desc { font-size: .82rem; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

/* ── 17. Pagination ───────────────────────────────────────── */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  padding: 16px 24px;
  margin-top: 32px;
  flex-wrap: wrap;
}
.pagination .page-number,
.pagination .prev,
.pagination .next,
.pagination .extend {
  padding: 8px 16px;
  border-radius: 999px;
  font-size: .88rem;
  font-weight: 500;
  color: var(--text);
  transition: all .2s var(--ease);
  background: rgba(79,142,247,.07);
  border: 1px solid rgba(79,142,247,.15);
}
.pagination .page-number,
.pagination .prev,
.pagination .next,
.pagination .extend {
  background: rgba(59,130,246,.08);
  border: 1px solid rgba(59,130,246,.18);
  color: var(--text-muted);
}
.pagination .page-number.current,
.pagination .page-number:hover,
.pagination .prev:hover,
.pagination .next:hover {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* ── 18. Footer ───────────────────────────────────────────── */
.site-footer {
  margin: 40px auto;
  width: calc(100% - 48px);
  max-width: 900px;
  border-radius: var(--radius);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  box-shadow: var(--glass-shadow);
  transition: all .3s var(--ease);
}
.site-footer:hover {
  transform: translateY(-5px);
  box-shadow: var(--glass-shadow-hover);
}

.footer-inner {
  padding: 32px 36px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

/* Quote */
.footer-quote {
  text-align: center;
  padding: 8px 0;
}
.footer-quote-text {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-style: italic;
  opacity: 0.9;
  letter-spacing: -0.01em;
  position: relative;
  display: inline-block;
  padding: 0 16px;
}
.footer-quote-text::before {
  content: '\201C';
  font-family: "Georgia", serif;
  font-size: 3.5rem;
  line-height: 1;
  position: absolute;
  left: -12px;
  top: -15px;
  opacity: .25;
  font-style: normal;
  color: var(--accent);
}
.footer-quote-text::after {
  content: '\201D';
  font-family: "Georgia", serif;
  font-size: 3.5rem;
  line-height: 1;
  position: absolute;
  right: -16px;
  bottom: -35px;
  opacity: .25;
  font-style: normal;
  color: var(--accent);
}
  font-style: normal;
  -webkit-text-fill-color: var(--accent-3);
}

.footer-copy { font-size: .85rem; color: var(--text-muted); }
.footer-icp  { font-size: .75rem; color: var(--text-muted); }
.footer-social {
  display: flex;
  gap: 16px;
}
.footer-social a {
  color: var(--text-muted);
  transition: color .2s, transform .2s var(--ease);
  width: 22px;
  height: 22px;
}
.footer-social a:hover { color: var(--accent); transform: translateY(-3px); }
.footer-social svg { width: 18px; height: 18px; }

/* ── 19. Lightbox ─────────────────────────────────────────── */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(20, 20, 40, 0.7);
  backdrop-filter: blur(12px) saturate(150%);
  -webkit-backdrop-filter: blur(12px) saturate(150%);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity .35s var(--ease-std);
}
.lightbox-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.lightbox-inner {
  display: flex;
  flex-direction: column;
  max-width: 90vw;
  width: auto;
  max-height: 90vh;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: rgba(10,17,38,0.78);
  backdrop-filter: blur(40px) saturate(190%);
  -webkit-backdrop-filter: blur(40px) saturate(190%);
  border: 1px solid rgba(79,142,247,.22);
  box-shadow: 0 32px 80px rgba(0,0,0,.65),
              0 0 0 1px rgba(255,255,255,.05) inset;
  transform: scale(0.94) translateY(16px);
  transition: transform .35s var(--ease);
  position: relative;
}
.lightbox-overlay.open .lightbox-inner {
  transform: scale(1) translateY(0);
}

.lightbox-media {
  min-width: 320px;
  min-height: 200px;
  /* Limit image size to viewport */
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lightbox-media img {
  max-width: 100%;
  max-height: 90vh;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
}

.lightbox-story {
  position: absolute;
  bottom: 24px;
  right: 24px;
  padding: 0;
  background: transparent;
  pointer-events: none;
  z-index: 10;
}

.lightbox-title,
.lightbox-meta,
.lightbox-content {
  display: none !important;
}

.lightbox-readmore {
  pointer-events: auto;
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  background: rgba(20, 30, 60, 0.75) !important;
  border: 1px solid rgba(120, 160, 255, 0.3) !important;
  color: #ffffff !important;
  text-shadow: 0 1px 2px rgba(0,0,0,0.5); /* 增加文字阴影，提高对比度 */
  padding: 10px 24px;
  border-radius: 999px;
  font-weight: 700; /* 加粗字体 */
  letter-spacing: 0.8px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.35);
  transition: all .25s var(--ease);
}

/* 强制覆盖所有主题下的字体颜色 - 提高权重 */
[data-theme="light"] .lightbox-readmore,
:root:not([data-theme="dark"]) .lightbox-readmore,
[data-theme="light"] .lightbox-readmore.btn-glass {
  color: #ffffff !important;
  background: rgba(20, 30, 60, 0.85) !important; /* 亮色模式下背景稍微加深一点点确保对比度 */
  text-shadow: 0 1px 3px rgba(0,0,0,0.8); /* 增强文字阴影 */
  border-color: rgba(255,255,255,0.3) !important;
}

/* 确保Hover状态也不变色 */
[data-theme="light"] .lightbox-readmore:hover,
:root:not([data-theme="dark"]) .lightbox-readmore:hover,
[data-theme="light"] .lightbox-readmore.btn-glass:hover {
  color: #ffffff !important;
  background: rgba(79, 142, 247, 0.95) !important;
  text-shadow: 0 1px 3px rgba(0,0,0,0.8);
}

.lightbox-readmore:hover {
  background: rgba(79, 142, 247, 0.95) !important;
  border-color: rgba(79, 142, 247, 0.8) !important;
  color: #ffffff !important;
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 12px 32px rgba(79, 142, 247, 0.4);
}

.lightbox-meta {
  font-size: .82rem;
  color: var(--text-muted);
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.lightbox-content {
  font-size: .9rem;
  line-height: 1.75;
  color: var(--text);
  flex: 1;
}

.lightbox-readmore {
  align-self: flex-start;
  margin-top: auto;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 20px;
  z-index: 1;
  width: 40px;
  height: 40px;
  background: rgba(15,24,48,.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(59,130,246,.25);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  transition: all .2s var(--ease);
  box-shadow: 0 2px 8px rgba(0,0,0,.40);
}
.lightbox-close:hover { transform: rotate(90deg) scale(1.1); background: rgba(255,255,255,.85); }
.lightbox-close svg { width: 20px; height: 20px; }

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  background: rgba(15,24,48,.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid rgba(59,130,246,.25);
  border-radius: 50%;
  font-size: 1.6rem;
  line-height: 1;
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .2s var(--ease);
  box-shadow: 0 2px 12px rgba(0,0,0,.40);
}
.lightbox-nav:hover { background: rgba(30,60,120,.85); transform: translateY(-50%) scale(1.08); }
.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }

/* ── 20. Search ───────────────────────────────────────────── */
.search-overlay {
  position: fixed;
  inset: 0;
  z-index: 8888;
  background: rgba(20,20,40,.5);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 100px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s var(--ease-std);
}
.search-overlay.open { opacity: 1; pointer-events: all; }

.search-box {
  width: 92vw;
  max-width: 620px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(10,17,38,.92) !important;
  border: 1px solid rgba(79,142,247,.22) !important;
}

.search-input-wrap {
  display: flex;
  align-items: center;
  padding: 16px 20px;
  gap: 12px;
  border-bottom: 1px solid rgba(79,142,247,.12);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.search-icon { color: var(--text-muted); flex-shrink: 0; width: 20px; height: 20px; }
#search-input {
  flex: 1;
  border: none;
  background: none;
  outline: none;
  font-size: 1rem;
  font-family: var(--font-sans);
  color: var(--text);
}
#search-input::placeholder { color: var(--text-muted); }
.search-close {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  padding: 4px;
  transition: color .2s;
}
.search-close:hover { color: var(--text); }
.search-close svg { width: 20px; height: 20px; }

.search-results { max-height: 420px; overflow-y: auto; padding: 8px 0; }
.search-result-item {
  padding: 14px 20px;
  cursor: pointer;
  transition: background .15s;
  display: flex;
  flex-direction: column;
  gap: 4px;
  border-radius: var(--radius-sm);
  margin: 4px 8px;
}
.search-result-item:hover { background: rgba(79,142,247,.10); }
.search-result-title { font-weight: 600; font-size: .95rem; }
.search-result-excerpt { font-size: .82rem; color: var(--text-muted); }
.search-result-item mark { background: rgba(79,142,247,.22); color: var(--accent-2); border-radius: 4px; padding: 0 3px; }
.search-empty { padding: 32px; text-align: center; color: var(--text-muted); font-size: .9rem; }

/* FAB search */
.fab-search {
  position: fixed;
  bottom: 36px;
  right: 36px;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 1px solid rgba(59,130,246,.25);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-2);
  transition: all .3s var(--ease);
  z-index: 500;
  background: rgba(8,14,30,.82);
  box-shadow: 0 4px 20px rgba(0,10,40,.50);
}
.fab-search:hover { transform: scale(1.1) translateY(-2px); box-shadow: 0 8px 32px rgba(79,142,247,.30); }
.fab-search svg { width: 22px; height: 22px; }

/* Comments section */
.comments-section {
  padding: 32px 36px;
  margin-top: 28px;
}
.comments-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 24px;
  padding-left: 12px;
  border-left: 3px solid var(--accent);
}

/* ── 21. Scrollbar ────────────────────────────────────────── */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: rgba(79,142,247,.28);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover { background: rgba(79,142,247,.52); }

/* ── 22. Responsive ───────────────────────────────────────── */
@media (max-width: 900px) {
  .post-content-wrap {
    grid-template-columns: 1fr;
  }
  .toc-panel {
    position: static;
    max-height: none;
    grid-row: 2;
  }
  .lightbox-inner {
    grid-template-columns: 1fr;
    max-height: 95vh;
    overflow-y: auto;
  }
  .lightbox-media { min-height: 250px; }
  .lightbox-nav { display: none; }
}

@media (max-width: 680px) {
  :root { --nav-h: 60px; }

  .site-header {
    top: 10px;
    width: calc(100% - 24px);
    border-radius: var(--radius);
  }

  .nav-menu {
    position: fixed;
    top: 80px;
    left: 12px;
    right: 12px;
    flex-direction: column;
    align-items: stretch;
    background: rgba(8,14,30,.95);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid rgba(59,130,246,.18);
    border-radius: var(--radius);
    padding: 16px;
    gap: 4px;
    box-shadow: var(--glass-shadow);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: all .3s var(--ease);
    z-index: 999;
  }
  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }
  .nav-link { border-radius: var(--radius-sm); padding: 10px 16px; }
  .nav-link::after { display: none; }

  /* On mobile, nav-menu is fixed (out of flow) → logo | theme-toggle | nav-toggle
     Override nav-inner to flex-start so items don't spread, then push
     theme-toggle to the far right with margin-left:auto */
  .nav-inner {
    justify-content: flex-start;
  }
  .theme-toggle {
    margin-left: auto !important;
    margin-right: 4px;
  }

  .nav-toggle { display: flex; }

  /* Light mode: bright mobile dropdown */
  [data-theme="light"] .nav-menu {
    background: rgba(240,246,255,0.97);
    border-color: rgba(79,142,247,.25);
    box-shadow: 0 8px 32px rgba(40,80,180,0.15);
  }
  [data-theme="light"] .nav-menu .nav-link {
    color: rgba(15,27,58,0.75) !important;
  }
  [data-theme="light"] .nav-menu .nav-link:hover {
    background: rgba(40,80,180,0.08);
    color: var(--accent) !important;
  }
  [data-theme="light"] .nav-menu .nav-link.active {
    background: rgba(40,80,180,0.10);
    color: var(--text) !important;
  }
  /* System-light without explicit theme attr */
  @media (prefers-color-scheme: light) {
    :root:not([data-theme="dark"]) .nav-menu {
      background: rgba(240,246,255,0.97);
      border-color: rgba(79,142,247,.25);
    }
    :root:not([data-theme="dark"]) .nav-menu .nav-link {
      color: rgba(15,27,58,0.75) !important;
    }
    :root:not([data-theme="dark"]) .nav-menu .nav-link:hover {
      background: rgba(40,80,180,0.08);
      color: var(--accent) !important;
    }
  }

  .posts-grid { grid-template-columns: 1fr; }
  .post-article { padding: 24px 20px; }
  .post-nav { grid-template-columns: 1fr; }
  .gallery-masonry { columns: 2 160px; }

  .footer-inner { padding: 20px 24px; }

  .fab-search { bottom: 24px; right: 24px; }
}

@media (max-width: 400px) {
  .gallery-masonry { columns: 1; }
}

/* ══════════════════════════════════════════════════════════
   23. Theme Toggle Button
══════════════════════════════════════════════════════════ */
.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(79,142,247,0.22);
  background: rgba(79,142,247,0.10);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-left: 8px;
  transition: background .25s var(--ease-std), transform .25s var(--ease);
}
.theme-toggle:hover {
  background: rgba(79,142,247,0.24);
  transform: rotate(22deg) scale(1.12);
}
.theme-toggle svg {
  width: 17px;
  height: 17px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: opacity .2s;
}
/* Dark mode: show sun, hide moon */
.icon-sun  { display: block; }
.icon-moon { display: none; }
/* Light mode: hide sun, show moon */
[data-theme="light"] .icon-sun  { display: none; }
[data-theme="light"] .icon-moon { display: block; }
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .icon-sun  { display: none; }
  :root:not([data-theme="dark"]) .icon-moon { display: block; }
}

/* ══════════════════════════════════════════════════════════
   24. Light Theme
   Applied when:
   · [data-theme="light"] is set on <html> (user picked light)
   · System prefers light AND user hasn't forced dark
══════════════════════════════════════════════════════════ */

/* — CSS variable overrides for explicit light mode — */
[data-theme="light"] {
  --bg:           #eef1f8;
  --bg2:          #e2e8f5;
  --text:         #0f1b3a;
  --text-muted:   #4d6484;
  --accent:       #2d6fe8;
  --accent-2:     #4f8ef7;
  --accent-3:     #7cb9ff;
  --link:         #2d6fe8;
  --border:       rgba(0,0,0,0.08);
  --glass-bg:     rgba(255,255,255,0.58);
  --glass-bg2:    rgba(255,255,255,0.82);
  --glass-border: 1px solid rgba(79,142,247,0.18);
  --glass-shadow: 0 8px 32px rgba(40,80,180,0.11),
                  0 2px 8px  rgba(40,80,180,0.07);
  --glass-shadow-hover: 0 18px 52px rgba(40,80,180,0.20),
                        0 4px 18px rgba(79,142,247,0.15);
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg:           #eef1f8;
    --bg2:          #e2e8f5;
    --text:         #0f1b3a;
    --text-muted:   #4d6484;
    --accent:       #2d6fe8;
    --accent-2:     #4f8ef7;
    --accent-3:     #7cb9ff;
    --link:         #2d6fe8;
    --border:       rgba(0,0,0,0.08);
    --glass-bg:     rgba(255,255,255,0.58);
    --glass-bg2:    rgba(255,255,255,0.82);
    --glass-border: 1px solid rgba(79,142,247,0.18);
    --glass-shadow: 0 8px 32px rgba(40,80,180,0.11),
                    0 2px 8px  rgba(40,80,180,0.07);
    --glass-shadow-hover: 0 18px 52px rgba(40,80,180,0.20),
                          0 4px 18px rgba(79,142,247,0.15);
  }
}

/* — Mixin for elements that use hardcoded dark colours — */
/* We reuse two classes: html[data-theme="light"] and
   the @media system-light selector. Using SASS would help
   but since this is plain CSS we write both. */

/* background layer */
[data-theme="light"] .bg-layer {
  background:
    radial-gradient(ellipse at 15% 10%, rgba(79,142,247,.25) 0%, transparent 52%),
    radial-gradient(ellipse at 85% 85%, rgba(40,90,200,.20) 0%, transparent 52%),
    radial-gradient(ellipse at 55% 45%, rgba(120,170,255,.18) 0%, transparent 48%),
    linear-gradient(160deg, #bfdbfe 0%, #dbeafe 50%, #bfdbfe 100%);
}
[data-theme="light"] .blob-1 { background: rgba(79,142,247,.15); opacity: .40; }
[data-theme="light"] .blob-2 { background: rgba(100,160,255,.12); opacity: .40; }
[data-theme="light"] .blob-3 { background: rgba(150,190,255,.10); opacity: .35; }

/* Nav bar */
[data-theme="light"] .site-header {
  background: rgba(250,252,255,0.60);
  border: 1px solid rgba(79,142,247,0.20);
  box-shadow: 0 4px 24px rgba(40,80,180,0.10),
              0 1px 0 rgba(255,255,255,0.80) inset;
}
[data-theme="light"] .site-header.scrolled {
  background: rgba(248,251,255,0.82);
  box-shadow: 0 8px 40px rgba(40,80,180,0.14),
              0 1px 0 rgba(255,255,255,0.90) inset;
}
[data-theme="light"] .nav-link { color: rgba(20,50,110,0.65) !important; }
[data-theme="light"] .nav-link:hover {
  background: rgba(40,80,180,0.06);
  color: var(--accent) !important;
}
[data-theme="light"] .nav-link.active {
  background: rgba(40,80,180,0.08);
  font-weight: 700;
  color: var(--text) !important;
  -webkit-text-fill-color: var(--text);
}
[data-theme="light"] .nav-link.active::after { display: block; }
[data-theme="light"] .nav-toggle span { background: var(--text); }
[data-theme="light"] .logo-text {
  background: linear-gradient(135deg, #2d6fe8, #4f8ef7);
  -webkit-background-clip: text;
  background-clip: text;
}
[data-theme="light"] .theme-toggle {
  border-color: rgba(79,142,247,.25);
  background: rgba(79,142,247,.08);
}

/* Search box */
[data-theme="light"] .search-box {
  background: rgba(250,252,255,0.96) !important;
  border: 1px solid rgba(79,142,247,.22) !important;
}
[data-theme="light"] .search-input-wrap {
  border-bottom-color: rgba(79,142,247,.14);
}
[data-theme="light"] #search-input {
  color: var(--text);
}
[data-theme="light"] #search-input::placeholder { color: var(--text-muted); }
[data-theme="light"] .search-result-item:hover { background: rgba(79,142,247,.08); }
[data-theme="light"] .search-result-meta { color: var(--text-muted); }

/* Lightbox */
[data-theme="light"] .lightbox-inner {
  background: rgba(250,252,255,0.90);
  border: 1px solid rgba(79,142,247,.22);
  box-shadow: 0 32px 80px rgba(40,80,180,0.25),
              0 0 0 1px rgba(255,255,255,.80) inset;
}
[data-theme="light"] .lightbox-info {
  background: rgba(240,245,255,0.95);
}

/* Post article */
[data-theme="light"] .post-body pre {
  background: rgba(230,238,255,.60);
  border-color: rgba(79,142,247,.16);
}
[data-theme="light"] .post-body code {
  background: rgba(79,142,247,.08);
  border-color: rgba(79,142,247,.18);
}
[data-theme="light"] .post-body blockquote {
  background: rgba(79,142,247,.07);
  border-left-color: var(--accent);
}
[data-theme="light"] .post-body th {
  background: rgba(79,142,247,.09);
}
[data-theme="light"] .post-body td,
[data-theme="light"] .post-body th {
  border-color: rgba(79,142,247,.14);
}
[data-theme="light"] .post-body tr:nth-child(even) td {
  background: rgba(79,142,247,.04);
}

/* Footer */
[data-theme="light"] .site-footer {
  background: rgba(220,230,250, 0.30);
  border-top: 1px solid rgba(79,142,247,.12);
}

/* FAB */
[data-theme="light"] .fab-search {
  background: linear-gradient(135deg, #2d6fe8, #4f8ef7) !important;
  color: #fff;
  border-color: transparent;
  box-shadow: 0 4px 20px rgba(40,80,180,0.30);
}

/* Pagination */
[data-theme="light"] .pagination a,
[data-theme="light"] .pagination span {
  background: rgba(79,142,247,.07);
  border-color: rgba(79,142,247,.18);
  color: var(--text) !important;
}
[data-theme="light"] .pagination .current {
  background: var(--accent);
  color: #fff !important;
  border-color: transparent;
}

/* Code highlight overrides for light mode */
[data-theme="light"] .hljs {
  background: transparent !important;
  color: #24292e;
}
[data-theme="light"] .hljs-keyword,
[data-theme="light"] .hljs-selector-tag { color: #d73a49; }
[data-theme="light"] .hljs-string,
[data-theme="light"] .hljs-attr         { color: #032f62; }
[data-theme="light"] .hljs-comment      { color: #6a737d; }
[data-theme="light"] .hljs-number       { color: #005cc5; }
[data-theme="light"] .hljs-title,
[data-theme="light"] .hljs-function     { color: #6f42c1; }
[data-theme="light"] .hljs-built_in     { color: #e36209; }

/* ---- System light (same overrides) ---- */
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) .bg-layer {
    background:
      radial-gradient(ellipse at 15% 10%, rgba(79,142,247,.25) 0%, transparent 52%),
      radial-gradient(ellipse at 85% 85%, rgba(40,90,200,.20) 0%, transparent 52%),
      radial-gradient(ellipse at 55% 45%, rgba(120,170,255,.18) 0%, transparent 48%),
      linear-gradient(160deg, #bfdbfe 0%, #dbeafe 50%, #bfdbfe 100%);
  }
  :root:not([data-theme="dark"]) .blob-1 { background: rgba(79,142,247,.15); opacity: .40; }
  :root:not([data-theme="dark"]) .blob-2 { background: rgba(100,160,255,.12); opacity: .40; }
  :root:not([data-theme="dark"]) .blob-3 { background: rgba(150,190,255,.10); opacity: .35; }
  :root:not([data-theme="dark"]) .site-header {
    background: rgba(250,252,255,0.60);
    border: 1px solid rgba(79,142,247,0.20);
    box-shadow: 0 4px 24px rgba(40,80,180,0.10),
                0 1px 0 rgba(255,255,255,0.80) inset;
  }
  :root:not([data-theme="dark"]) .site-header.scrolled {
    background: rgba(248,251,255,0.82);
    box-shadow: 0 8px 40px rgba(40,80,180,0.14),
                0 1px 0 rgba(255,255,255,0.90) inset;
  }
  :root:not([data-theme="dark"]) .nav-link { color: rgba(20,50,110,0.65) !important; }
  :root:not([data-theme="dark"]) .nav-link:hover {
    background: rgba(40,80,180,0.06);
    color: var(--accent) !important;
  }
  :root:not([data-theme="dark"]) .nav-link.active {
    background: rgba(40,80,180,0.08);
    font-weight: 700;
    color: var(--text) !important;
    -webkit-text-fill-color: var(--text);
  }
  :root:not([data-theme="dark"]) .nav-link.active::after { display: block; }
  :root:not([data-theme="dark"]) .nav-toggle span { background: var(--text); }
  :root:not([data-theme="dark"]) .search-box {
    background: rgba(250,252,255,0.96) !important;
    border: 1px solid rgba(79,142,247,.22) !important;
  }
  :root:not([data-theme="dark"]) #search-input { color: var(--text); }
  :root:not([data-theme="dark"]) .lightbox-inner {
    background: rgba(250,252,255,0.90);
    border: 1px solid rgba(79,142,247,.22);
  }
  :root:not([data-theme="dark"]) .post-body pre {
    background: rgba(230,238,255,.60);
    border-color: rgba(79,142,247,.16);
  }
  :root:not([data-theme="dark"]) .post-body code {
    background: rgba(79,142,247,.08);
    border-color: rgba(79,142,247,.18);
  }
  :root:not([data-theme="dark"]) .site-footer {
    background: rgba(220,230,250, 0.30);
    border-top: 1px solid rgba(79,142,247,.12);
  }
  :root:not([data-theme="dark"]) .fab-search {
    background: linear-gradient(135deg, #2d6fe8, #4f8ef7) !important;
    color: #fff;
    border-color: transparent;
  }
  :root:not([data-theme="dark"]) .hljs { background: transparent !important; color: #24292e; }
  :root:not([data-theme="dark"]) .hljs-keyword,
  :root:not([data-theme="dark"]) .hljs-selector-tag { color: #d73a49; }
  :root:not([data-theme="dark"]) .hljs-string,
  :root:not([data-theme="dark"]) .hljs-attr         { color: #032f62; }
  :root:not([data-theme="dark"]) .hljs-comment      { color: #6a737d; }
  :root:not([data-theme="dark"]) .hljs-number       { color: #005cc5; }
  :root:not([data-theme="dark"]) .hljs-title,
  :root:not([data-theme="dark"]) .hljs-function     { color: #6f42c1; }
}

/* Smooth theme transition */
html.theme-transitioning,
html.theme-transitioning *,
html.theme-transitioning *::before,
html.theme-transitioning *::after {
  transition: background .30s ease, background-color .30s ease, color .20s ease,
              border-color .25s ease, box-shadow .30s ease !important;
}