/* ============================================
   阿嵌Blog - 主样式表
   风格：Terminal × Magazine
   ============================================ */

/* --- 主题变量 --- */
:root[data-theme="dark"] {
  --bg: #080d14;
  --bg-2: #0d1320;
  --bg-card: #111927;
  --bg-elevated: #1a2332;
  --text: #e6edf3;
  --text-muted: #8b949e;
  --text-dim: #6e7681;
  --border: #1e2533;
  --border-light: #2a3340;
  --accent: #00d4ff;          /* 霓虹青 */
  --accent-2: #39ff14;        /* 霓虹绿 */
  --accent-3: #ff6b35;        /* 警示橙 */
  --accent-4: #a855f7;        /* AI 紫 */
  --gradient: linear-gradient(135deg, #00d4ff 0%, #a855f7 50%, #ff6b35 100%);
  --gradient-text: linear-gradient(135deg, #00d4ff 0%, #a855f7 100%);
  --shadow: 0 8px 32px rgba(0, 212, 255, 0.06);
  --shadow-glow: 0 0 40px rgba(0, 212, 255, 0.15);
  --grid-color: rgba(0, 212, 255, 0.05);
  --kbd-bg: #1a2332;
  --code-bg: #0a0f1a;
}

:root[data-theme="light"] {
  --bg: #fafbfc;
  --bg-2: #ffffff;
  --bg-card: #ffffff;
  --bg-elevated: #f4f6f9;
  --text: #1a1f2e;
  --text-muted: #5a6470;
  --text-dim: #8a94a0;
  --border: #e5e9f0;
  --border-light: #d0d7de;
  --accent: #0969da;
  --accent-2: #1a7f37;
  --accent-3: #cf222e;
  --accent-4: #8250df;
  --gradient: linear-gradient(135deg, #0969da 0%, #8250df 50%, #cf222e 100%);
  --gradient-text: linear-gradient(135deg, #0969da 0%, #8250df 100%);
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  --shadow-glow: 0 0 30px rgba(9, 105, 218, 0.1);
  --grid-color: rgba(9, 105, 218, 0.04);
  --kbd-bg: #f4f6f9;
  --code-bg: #f6f8fa;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background 0.3s ease, color 0.3s ease;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--accent); }

img { max-width: 100%; display: block; }

code, pre, kbd { font-family: "SF Mono", "JetBrains Mono", "Fira Code", ui-monospace, "Cascadia Code", monospace; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 2rem; }

/* --- 导航栏 --- */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s ease;
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}
.logo-icon { font-size: 1.3rem; }
.logo-text { background: var(--gradient-text); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

.nav-links { display: flex; gap: 0.4rem; }
.nav-link {
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: all 0.2s ease;
}
.nav-link:hover { color: var(--accent); background: color-mix(in srgb, var(--accent) 8%, transparent); }
.nav-link.active { color: var(--accent); }

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 38px;
  height: 38px;
  border-radius: 8px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }
:root[data-theme="dark"] .icon-sun { display: block; }
:root[data-theme="dark"] .icon-moon { display: none; }
:root[data-theme="light"] .icon-sun { display: none; }
:root[data-theme="light"] .icon-moon { display: block; }

.mobile-menu-btn { display: none; background: transparent; border: 0; width: 32px; height: 32px; flex-direction: column; justify-content: space-around; cursor: pointer; }
.mobile-menu-btn span { display: block; height: 2px; background: var(--text); border-radius: 1px; transition: all 0.2s ease; }
.mobile-menu { display: none; position: fixed; top: 60px; left: 0; right: 0; background: var(--bg); border-bottom: 1px solid var(--border); padding: 1rem 2rem; z-index: 99; }
.mobile-menu.open { display: block; }
.mobile-nav-link { display: block; padding: 0.8rem 0; color: var(--text-muted); border-bottom: 1px solid var(--border); }
.mobile-nav-link.active { color: var(--accent); }

/* --- Hero 区域 --- */
.hero {
  position: relative;
  min-height: calc(100vh - 60px);
  display: flex;
  align-items: center;
  padding: 4rem 2rem;
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}
.hero-glow {
  position: absolute;
  top: 30%; left: 50%;
  width: 600px; height: 600px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 15%, transparent) 0%, transparent 60%);
  filter: blur(40px);
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 3rem;
  align-items: center;
}
.hero-avatar {
  position: relative;
  width: 120px; height: 120px;
}
.hero-avatar img {
  width: 100%; height: 100%;
  border-radius: 50%;
  border: 2px solid var(--border);
  position: relative; z-index: 2;
}
.avatar-ring {
  position: absolute; inset: -6px;
  border-radius: 50%;
  border: 2px solid transparent;
  background: var(--gradient) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: spin 8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.hero-text { max-width: 700px; }
.hero-label { font-family: "SF Mono", monospace; font-size: 0.9rem; color: var(--accent-2); margin-bottom: 0.5rem; }
.terminal-prompt { opacity: 0.8; }
.hero-title {
  font-size: clamp(2.5rem, 7vw, 4.5rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1rem;
  background: var(--gradient-text);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.cursor {
  color: var(--accent);
  -webkit-text-fill-color: var(--accent);
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  font-weight: 500;
}
.hero-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 2rem; }
.tag {
  display: inline-block;
  padding: 0.3rem 0.8rem;
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 25%, transparent);
  color: var(--accent);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  font-family: "SF Mono", monospace;
}
.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.4rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.2s ease;
  cursor: pointer;
  border: 0;
}
.btn-primary {
  background: var(--accent);
  color: #080d14;
}
.btn-primary:hover {
  background: color-mix(in srgb, var(--accent) 90%, white);
  color: #080d14;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px color-mix(in srgb, var(--accent) 40%, transparent);
}
.btn-ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-dim);
  font-size: 0.75rem;
  font-family: "SF Mono", monospace;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  animation: bounce 2s ease-in-out infinite;
}
@keyframes bounce { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(8px); } }

/* --- 通用 Section --- */
.section { padding: 5rem 0; }
.section-header { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 2.5rem; flex-wrap: wrap; gap: 1rem; }
.section-title-wrap { display: flex; align-items: baseline; gap: 0.5rem; }
.section-line { color: var(--accent-2); font-family: "SF Mono", monospace; opacity: 0.7; }
.section-title { font-size: 1.8rem; font-weight: 700; letter-spacing: -0.02em; }
.section-more {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}
.section-more:hover { color: var(--accent); }

/* --- 文章卡片网格 --- */
.posts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}
.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  text-decoration: none;
  color: inherit;
  position: relative;
  overflow: hidden;
}
.post-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}
.post-card:hover { border-color: var(--accent); transform: translateY(-4px); box-shadow: var(--shadow); }
.post-card:hover::before { transform: scaleX(1); }
.post-card-meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: "SF Mono", monospace;
  font-size: 0.78rem;
  color: var(--text-dim);
}
.post-card-date { color: var(--accent); }
.post-card-cat {
  padding: 0.15rem 0.5rem;
  background: color-mix(in srgb, var(--accent-4) 15%, transparent);
  color: var(--accent-4);
  border-radius: 4px;
  font-size: 0.72rem;
  font-weight: 500;
}
.post-card-title {
  font-size: 1.15rem;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--text);
}
.post-card:hover .post-card-title { color: var(--accent); }
.post-card-excerpt {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.post-card-footer { margin-top: auto; display: flex; flex-wrap: wrap; gap: 0.4rem; }
.post-card-tag {
  font-family: "SF Mono", monospace;
  font-size: 0.72rem;
  padding: 0.2rem 0.5rem;
  background: var(--bg-elevated);
  color: var(--text-muted);
  border-radius: 4px;
}
.post-card-stats {
  display: flex;
  gap: 1rem;
  font-size: 0.78rem;
  color: var(--text-dim);
  font-family: "SF Mono", monospace;
}
.post-card-stats span { display: inline-flex; align-items: center; gap: 0.3rem; }

/* --- 技术栈卡片 --- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}
.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.6rem;
  transition: all 0.3s ease;
}
.skill-card:hover { border-color: var(--accent); transform: translateY(-3px); box-shadow: var(--shadow); }
.skill-icon {
  font-size: 2rem;
  margin-bottom: 0.8rem;
  display: inline-block;
}
.skill-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 0.5rem; }
.skill-card p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; margin-bottom: 1rem; }
.skill-bar { height: 4px; background: var(--bg-elevated); border-radius: 2px; overflow: hidden; }
.skill-bar-fill {
  height: 100%;
  width: var(--w);
  background: var(--gradient);
  border-radius: 2px;
  transition: width 1s ease;
}

/* --- 页脚 --- */
.footer {
  border-top: 1px solid var(--border);
  padding: 3rem 0 1.5rem;
  margin-top: 4rem;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 2rem;
  flex-wrap: wrap;
}
.footer-logo { font-weight: 700; font-size: 1.05rem; }
.footer-desc { color: var(--text-muted); font-size: 0.9rem; margin-top: 0.4rem; }
.footer-right { display: flex; gap: 1.5rem; }
.footer-link { color: var(--text-muted); font-size: 0.92rem; }
.footer-link:hover { color: var(--accent); }
.footer-bottom {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-dim);
  font-size: 0.85rem;
  font-family: "SF Mono", monospace;
}

/* --- 响应式 --- */
@media (max-width: 768px) {
  .container, .nav-inner { padding: 0 1.2rem; }
  .nav-links { display: none; }
  .mobile-menu-btn { display: flex; }
  .hero { padding: 3rem 1.2rem; min-height: auto; }
  .hero-content { grid-template-columns: 1fr; gap: 1.5rem; text-align: center; }
  .hero-avatar { margin: 0 auto; width: 100px; height: 100px; }
  .hero-tags, .hero-cta { justify-content: center; }
  .scroll-hint { display: none; }
  .posts-grid { grid-template-columns: 1fr; }
  .section { padding: 3rem 0; }
  .footer-inner { flex-direction: column; }
  .footer-right { flex-wrap: wrap; gap: 1rem; }
}

/* --- 滚动条 --- */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: color-mix(in srgb, var(--text-muted) 30%, transparent); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: color-mix(in srgb, var(--text-muted) 50%, transparent); }

/* --- 选区颜色 --- */
::selection { background: color-mix(in srgb, var(--accent) 30%, transparent); color: var(--text); }