/* ========== Design Tokens ========== */
:root {
  --color-primary: #6366f1;
  --color-primary-light: #818cf8;
  --color-primary-dark: #4f46e5;
  --color-accent: #ec4899;
  --color-success: #10b981;
  --color-warning: #f59e0b;

  --color-bg: #ffffff;
  --color-bg-secondary: #f9fafb;
  --color-bg-tertiary: #f3f4f6;
  --color-bg-card: #ffffff;
  --color-bg-hover: #f9fafb;

  --color-text: #1f2937;
  --color-text-secondary: #6b7280;
  --color-text-tertiary: #9ca3af;

  --color-border: #e5e7eb;
  --color-border-light: #f3f4f6;

  --color-shadow: 0 1px 3px rgba(0,0,0,0.08);
  --color-shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --color-shadow-lg: 0 12px 32px rgba(0,0,0,0.12);

  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', 'Roboto Mono', 'Courier New', monospace;
  --font-serif: 'Noto Serif SC', Georgia, 'Times New Roman', serif;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  --max-width: 1200px;
  --max-width-narrow: 760px;

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);

  --header-height: 72px;
}

[data-theme="dark"] {
  --color-primary: #818cf8;
  --color-primary-light: #a5b4fc;
  --color-primary-dark: #6366f1;

  --color-bg: #0f0f14;
  --color-bg-secondary: #18181f;
  --color-bg-tertiary: #1e1e28;
  --color-bg-card: #18181f;
  --color-bg-hover: #1e1e28;

  --color-text: #e5e7eb;
  --color-text-secondary: #9ca3af;
  --color-text-tertiary: #6b7280;

  --color-border: #2a2a35;
  --color-border-light: #1e1e28;

  --color-shadow: 0 1px 3px rgba(0,0,0,0.3);
  --color-shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --color-shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
}

/* ========== 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(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  font-size: 16px;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; transition: color var(--transition-fast); }
a:hover { color: var(--color-primary); }

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

ul, ol { list-style: none; }

button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

::selection { background: var(--color-primary); color: #fff; }

/* ========== Layout ========== */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: var(--max-width-narrow); margin: 0 auto; padding: 0 24px; }

/* ========== Header ========== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--header-height);
  background: color-mix(in srgb, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background var(--transition);
}
.site-header.scrolled { border-bottom-color: var(--color-border); }

.header-inner {
  max-width: var(--max-width); height: 100%; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 32px;
}

.logo { display: flex; align-items: center; gap: 10px; font-size: 1.35rem; font-weight: 800; letter-spacing: -0.02em; }
.logo-mark {
  width: 36px; height: 36px; border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.05rem; font-weight: 700;
  box-shadow: 0 2px 8px color-mix(in srgb, var(--color-primary) 40%, transparent);
}
.logo-text { background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }

.nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
  padding: 8px 16px; border-radius: var(--radius-full);
  font-size: 0.9rem; font-weight: 500; color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}
.nav-link:hover { color: var(--color-text); background: var(--color-bg-tertiary); }
.nav-link.active { color: var(--color-primary); background: color-mix(in srgb, var(--color-primary) 10%, transparent); }

.header-actions { display: flex; align-items: center; gap: 8px; }

.theme-toggle {
  width: 40px; height: 40px; border-radius: var(--radius-full);
  display: flex; align-items: center; justify-content: center;
  background: var(--color-bg-tertiary); color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}
.theme-toggle:hover { color: var(--color-text); background: var(--color-border); }
.theme-toggle svg { width: 20px; height: 20px; }
.theme-toggle .moon { display: none; }
[data-theme="dark"] .theme-toggle .sun { display: none; }
[data-theme="dark"] .theme-toggle .moon { display: block; }

.search-btn {
  width: 40px; height: 40px; border-radius: var(--radius-full);
  display: flex; align-items: center; justify-content: center;
  background: var(--color-bg-tertiary); color: var(--color-text-secondary);
  transition: all var(--transition-fast);
}
.search-btn:hover { color: var(--color-text); background: var(--color-border); }

.mobile-menu-btn { display: none; width: 40px; height: 40px; border-radius: var(--radius-full); align-items: center; justify-content: center; background: var(--color-bg-tertiary); color: var(--color-text-secondary); }
.mobile-menu-btn svg { width: 22px; height: 22px; }

/* Mobile Nav */
.mobile-nav {
  position: fixed; top: var(--header-height); left: 0; right: 0; z-index: 999;
  background: var(--color-bg); border-bottom: 1px solid var(--color-border);
  padding: 16px 24px; display: flex; flex-direction: column; gap: 4px;
  transform: translateY(-100%); opacity: 0; pointer-events: none;
  transition: all var(--transition);
}
.mobile-nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
.mobile-nav .nav-link { padding: 12px 16px; font-size: 1rem; }

@media (max-width: 768px) {
  .nav { display: none; }
  .mobile-menu-btn { display: flex; }
}

/* ========== Search Overlay ========== */
.search-overlay {
  position: fixed; inset: 0; z-index: 2000;
  background: color-mix(in srgb, #000 60%, transparent);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  display: flex; align-items: flex-start; justify-content: center;
  padding-top: 120px; opacity: 0; pointer-events: none;
  transition: opacity var(--transition);
}
.search-overlay.open { opacity: 1; pointer-events: auto; }
.search-box {
  width: 100%; max-width: 640px; background: var(--color-bg-card);
  border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  box-shadow: var(--color-shadow-lg); overflow: hidden;
  transform: scale(0.96); transition: transform var(--transition);
}
.search-overlay.open .search-box { transform: scale(1); }
.search-input {
  width: 100%; padding: 20px 24px 20px 56px;
  font-size: 1.1rem; background: transparent; border: none; outline: none;
  color: var(--color-text); font-family: inherit;
}
.search-input::placeholder { color: var(--color-text-tertiary); }
.search-icon { position: absolute; left: 20px; top: 22px; color: var(--color-text-tertiary); }

/* ========== Hero ========== */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  overflow: hidden; padding: var(--header-height) 0 80px;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-bg::before {
  content: ''; position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 20% 0%, color-mix(in srgb, var(--color-primary) 15%, transparent), transparent),
    radial-gradient(ellipse 60% 50% at 80% 100%, color-mix(in srgb, var(--color-accent) 10%, transparent), transparent);
}
.hero-bg::after {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(color-mix(in srgb, var(--color-text) 4%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--color-text) 4%, transparent) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 100% 80% at 50% 40%, #000, transparent);
  -webkit-mask-image: radial-gradient(ellipse 100% 80% at 50% 40%, #000, transparent);
}

.hero-content { position: relative; z-index: 1; width: 100%; }
.hero-tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: var(--radius-full);
  background: color-mix(in srgb, var(--color-primary) 10%, transparent);
  color: var(--color-primary); font-size: 0.82rem; font-weight: 600;
  margin-bottom: 24px;
}
.hero-tag-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--color-success); animation: pulse 2s infinite; }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }

.hero-title { font-size: clamp(2.5rem, 6vw, 4.5rem); font-weight: 800; line-height: 1.1; letter-spacing: -0.03em; margin-bottom: 20px; }
.hero-title .gradient { background: linear-gradient(135deg, var(--color-primary), var(--color-accent)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-subtitle { font-size: clamp(1.05rem, 2.5vw, 1.3rem); color: var(--color-text-secondary); max-width: 580px; margin-bottom: 36px; }

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: var(--radius-full);
  font-size: 0.92rem; font-weight: 600; transition: all var(--transition-fast);
}
.btn-primary { background: var(--color-primary); color: #fff; box-shadow: 0 4px 14px color-mix(in srgb, var(--color-primary) 35%, transparent); }
.btn-primary:hover { background: var(--color-primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 20px color-mix(in srgb, var(--color-primary) 45%, transparent); }
.btn-outline { border: 1.5px solid var(--color-border); color: var(--color-text); background: var(--color-bg-card); }
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); transform: translateY(-2px); }

.hero-stats { display: flex; gap: 40px; margin-top: 56px; flex-wrap: wrap; }
.hero-stat { display: flex; flex-direction: column; }
.hero-stat-num { font-size: 1.8rem; font-weight: 800; color: var(--color-text); }
.hero-stat-label { font-size: 0.85rem; color: var(--color-text-tertiary); }

/* ========== Section ========== */
.section { padding: 80px 0; }
.section-header { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 40px; gap: 24px; }
.section-title { font-size: clamp(1.6rem, 3.5vw, 2.2rem); font-weight: 800; letter-spacing: -0.02em; }
.section-subtitle { color: var(--color-text-secondary); font-size: 0.95rem; margin-top: 6px; }
.section-link { color: var(--color-primary); font-size: 0.9rem; font-weight: 600; display: inline-flex; align-items: center; gap: 4px; white-space: nowrap; }
.section-link:hover { gap: 8px; }

/* ========== Article Grid ========== */
.article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
@media (max-width: 960px) { .article-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .article-grid { grid-template-columns: 1fr; } }

.article-card {
  background: var(--color-bg-card); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); overflow: hidden;
  transition: all var(--transition); cursor: pointer;
  display: flex; flex-direction: column;
}
.article-card:hover { transform: translateY(-4px); box-shadow: var(--color-shadow-lg); border-color: color-mix(in srgb, var(--color-primary) 30%, var(--color-border)); }

.article-card-cover { position: relative; aspect-ratio: 16/9; overflow: hidden; }
.article-card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.article-card:hover .article-card-cover img { transform: scale(1.06); }

.article-card-cover-gradient {
  width: 100%; height: 100%;
  display: flex; align-items: center; justify-content: center;
  font-size: 2.5rem; font-weight: 800; color: rgba(255,255,255,0.9);
}

.article-card-body { padding: 20px 22px; flex: 1; display: flex; flex-direction: column; }
.article-card-tag { font-size: 0.75rem; font-weight: 600; color: var(--color-primary); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 10px; }
.article-card-title { font-size: 1.1rem; font-weight: 700; line-height: 1.4; margin-bottom: 8px; letter-spacing: -0.01em; }
.article-card-excerpt { font-size: 0.88rem; color: var(--color-text-secondary); line-height: 1.6; margin-bottom: 16px; flex: 1; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.article-card-meta { display: flex; align-items: center; gap: 12px; font-size: 0.8rem; color: var(--color-text-tertiary); }
.article-card-meta .dot { width: 3px; height: 3px; border-radius: 50%; background: currentColor; }

/* Featured card (large) */
.article-card.featured { grid-column: span 2; }
.article-card.featured .article-card-cover { aspect-ratio: 21/9; }
.article-card.featured .article-card-title { font-size: 1.5rem; }
.article-card.featured .article-card-excerpt { font-size: 0.95rem; -webkit-line-clamp: 3; }
@media (max-width: 960px) { .article-card.featured { grid-column: span 2; } }
@media (max-width: 600px) { .article-card.featured { grid-column: span 1; } }

/* ========== Categories ========== */
.category-bar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 36px; }
.category-chip {
  padding: 8px 18px; border-radius: var(--radius-full);
  font-size: 0.88rem; font-weight: 500; color: var(--color-text-secondary);
  background: var(--color-bg-tertiary); border: 1px solid transparent;
  transition: all var(--transition-fast);
}
.category-chip:hover { color: var(--color-text); border-color: var(--color-border); }
.category-chip.active { color: #fff; background: var(--color-primary); border-color: var(--color-primary); }

/* ========== Pagination ========== */
.pagination { display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 48px; }
.page-btn {
  min-width: 40px; height: 40px; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.9rem; font-weight: 600; color: var(--color-text-secondary);
  background: var(--color-bg-card); border: 1px solid var(--color-border);
  transition: all var(--transition-fast); padding: 0 14px;
}
.page-btn:hover:not(:disabled) { color: var(--color-primary); border-color: var(--color-primary); }
.page-btn.active { color: #fff; background: var(--color-primary); border-color: var(--color-primary); }
.page-btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* ========== Article Detail ========== */
.article-hero { padding: calc(var(--header-height) + 48px) 0 40px; text-align: center; }
.article-hero .article-card-tag { font-size: 0.82rem; margin-bottom: 16px; }
.article-hero h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); font-weight: 800; line-height: 1.25; letter-spacing: -0.02em; margin-bottom: 20px; max-width: 800px; margin-left: auto; margin-right: auto; }
.article-hero .meta { display: flex; align-items: center; justify-content: center; gap: 16px; color: var(--color-text-tertiary); font-size: 0.88rem; }
.article-cover { width: 100%; max-width: 900px; margin: 0 auto 48px; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--color-shadow-lg); }

.article-body { display: grid; grid-template-columns: 1fr 240px; gap: 48px; align-items: start; }
.article-content { font-size: 1.05rem; line-height: 1.85; color: var(--color-text); }
.article-content h2 { font-size: 1.5rem; font-weight: 700; margin: 40px 0 16px; letter-spacing: -0.01em; scroll-margin-top: 90px; }
.article-content h3 { font-size: 1.2rem; font-weight: 600; margin: 32px 0 12px; }
.article-content p { margin-bottom: 20px; }
.article-content ul, .article-content ol { margin: 16px 0 20px; padding-left: 24px; }
.article-content ul li { list-style: disc; margin-bottom: 8px; }
.article-content ol li { list-style: decimal; margin-bottom: 8px; }
.article-content code {
  font-family: var(--font-mono); font-size: 0.88em;
  background: var(--color-bg-tertiary); padding: 2px 6px; border-radius: 4px;
  color: var(--color-primary);
}
.article-content pre {
  background: var(--color-bg-tertiary); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: 20px 24px; margin: 24px 0;
  overflow-x: auto; font-size: 0.9rem; line-height: 1.6;
}
.article-content pre code { background: none; padding: 0; color: var(--color-text); font-size: inherit; }
.article-content blockquote {
  border-left: 3px solid var(--color-primary); padding: 8px 0 8px 20px;
  margin: 24px 0; color: var(--color-text-secondary); font-style: italic;
}
.article-content img { border-radius: var(--radius-md); margin: 24px 0; }
.article-content a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 3px; }

/* Table of Contents */
.toc { position: sticky; top: calc(var(--header-height) + 24px); }
.toc-title { font-size: 0.8rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-text-tertiary); margin-bottom: 16px; }
.toc-list { display: flex; flex-direction: column; gap: 2px; border-left: 2px solid var(--color-border); padding-left: 16px; }
.toc-link { font-size: 0.85rem; color: var(--color-text-secondary); padding: 6px 0; transition: all var(--transition-fast); border-radius: 0; }
.toc-link:hover, .toc-link.active { color: var(--color-primary); font-weight: 600; }
.toc-link.level-3 { padding-left: 16px; font-size: 0.8rem; }

@media (max-width: 960px) { .article-body { grid-template-columns: 1fr; } .toc { display: none; } }

/* Author box */
.author-box {
  display: flex; align-items: center; gap: 16px; padding: 24px;
  background: var(--color-bg-card); border: 1px solid var(--color-border);
  border-radius: var(--radius-lg); margin-top: 48px;
}
.author-avatar { width: 56px; height: 56px; border-radius: 50%; object-fit: cover; flex-shrink: 0; }
.author-name { font-weight: 700; font-size: 1rem; }
.author-desc { font-size: 0.85rem; color: var(--color-text-secondary); }

/* ========== About Page ========== */
.about-hero { padding: calc(var(--header-height) + 60px) 0 40px; text-align: center; }
.about-avatar { width: 120px; height: 120px; border-radius: 50%; margin: 0 auto 24px; border: 4px solid var(--color-bg-card); box-shadow: var(--color-shadow-md); }
.about-name { font-size: 2rem; font-weight: 800; margin-bottom: 8px; }
.about-role { color: var(--color-text-secondary); font-size: 1.1rem; margin-bottom: 24px; }
.about-bio { max-width: 600px; margin: 0 auto; color: var(--color-text-secondary); line-height: 1.8; }

.skill-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 20px; }
.skill-card { padding: 24px; background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); transition: all var(--transition); }
.skill-card:hover { border-color: var(--color-primary); transform: translateY(-2px); }
.skill-card-icon { width: 44px; height: 44px; border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; font-size: 1.4rem; margin-bottom: 14px; background: var(--color-bg-tertiary); }
.skill-card-title { font-weight: 700; margin-bottom: 4px; }
.skill-card-desc { font-size: 0.85rem; color: var(--color-text-secondary); }

.timeline { position: relative; padding-left: 32px; }
.timeline::before { content: ''; position: absolute; left: 8px; top: 8px; bottom: 8px; width: 2px; background: var(--color-border); }
.timeline-item { position: relative; padding-bottom: 32px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before { content: ''; position: absolute; left: -28px; top: 6px; width: 12px; height: 12px; border-radius: 50%; background: var(--color-primary); border: 2px solid var(--color-bg); }
.timeline-date { font-size: 0.82rem; color: var(--color-primary); font-weight: 600; margin-bottom: 4px; }
.timeline-title { font-weight: 700; margin-bottom: 4px; }
.timeline-desc { font-size: 0.9rem; color: var(--color-text-secondary); }

/* ========== Footer ========== */
.site-footer { border-top: 1px solid var(--color-border); padding: 48px 0 32px; background: var(--color-bg-secondary); }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; gap: 40px; flex-wrap: wrap; }
.footer-brand { max-width: 360px; }
.footer-brand .logo { margin-bottom: 12px; }
.footer-brand p { font-size: 0.88rem; color: var(--color-text-secondary); line-height: 1.6; }
.footer-links { display: flex; gap: 48px; flex-wrap: wrap; }
.footer-col h4 { font-size: 0.82rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-text-tertiary); margin-bottom: 14px; }
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col a { font-size: 0.88rem; color: var(--color-text-secondary); }
.footer-col a:hover { color: var(--color-primary); }
.footer-bottom { margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--color-border); display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.footer-bottom p { font-size: 0.82rem; color: var(--color-text-tertiary); }
.social-links { display: flex; gap: 8px; }
.social-link { width: 36px; height: 36px; border-radius: var(--radius-full); display: flex; align-items: center; justify-content: center; background: var(--color-bg-tertiary); color: var(--color-text-secondary); transition: all var(--transition-fast); }
.social-link:hover { color: #fff; background: var(--color-primary); transform: translateY(-2px); }
.social-link svg { width: 18px; height: 18px; }

/* ========== Scroll Reveal ========== */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ========== Scrollbar ========== */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 5px; border: 2px solid var(--color-bg); }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-tertiary); }

/* ========== Radio Page ========== */
/* Logbook Table */
.logbook-table { width: 100%; border-collapse: collapse; background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; font-size: 0.9rem; }
.logbook-table thead { background: var(--color-bg-tertiary); }
.logbook-table th { padding: 14px 16px; text-align: left; font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--color-text-tertiary); border-bottom: 1px solid var(--color-border); white-space: nowrap; }
.logbook-table td { padding: 14px 16px; border-bottom: 1px solid var(--color-border-light); color: var(--color-text-secondary); white-space: nowrap; }
.logbook-table tbody tr { transition: background var(--transition-fast); }
.logbook-table tbody tr:hover { background: var(--color-bg-hover); }
.logbook-table tbody tr:last-child td { border-bottom: none; }
.logbook-table td strong { color: var(--color-text); }

.mode-badge { display: inline-block; padding: 3px 10px; border-radius: var(--radius-full); font-size: 0.75rem; font-weight: 700; letter-spacing: 0.04em; }
.mode-badge.ft8 { background: color-mix(in srgb, #f97316 15%, transparent); color: #f97316; }
.mode-badge.ssb { background: color-mix(in srgb, #10b981 15%, transparent); color: #10b981; }
.mode-badge.fm { background: color-mix(in srgb, #3b82f6 15%, transparent); color: #3b82f6; }
.mode-badge.cw { background: color-mix(in srgb, #8b5cf6 15%, transparent); color: #8b5cf6; }

/* Frequency Grid */
.freq-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
@media (max-width: 960px) { .freq-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 480px) { .freq-grid { grid-template-columns: 1fr; } }
.freq-card { padding: 20px; background: var(--color-bg-card); border: 1px solid var(--color-border); border-radius: var(--radius-lg); transition: all var(--transition); }
.freq-card:hover { border-color: var(--color-primary); transform: translateY(-2px); box-shadow: var(--color-shadow-md); }
.freq-card.highlight { border-color: color-mix(in srgb, var(--color-warning) 40%, var(--color-border)); }
.freq-card.highlight:hover { border-color: var(--color-warning); }
.freq-band { font-size: 1.3rem; font-weight: 800; color: var(--color-text); margin-bottom: 4px; }
.freq-range { font-family: var(--font-mono); font-size: 0.82rem; color: var(--color-primary); margin-bottom: 6px; }
.freq-note { font-size: 0.82rem; color: var(--color-text-tertiary); }

/* ========== Misc ========== */
.page-wrapper { padding-top: var(--header-height); }
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }