:root {
  --color-bg: #0A0A0F;
  --color-bg-alt: #12121A;
  --color-surface: rgba(255, 255, 255, 0.03);
  --color-surface-hover: rgba(255, 255, 255, 0.06);
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-glow: rgba(74, 158, 255, 0.3);
  --color-primary: #4A9EFF;
  --color-primary-dim: rgba(74, 158, 255, 0.15);
  --color-accent-green: #00E5A0;
  --color-accent-orange: #FF6B35;
  --color-accent-purple: #A78BFA;
  --color-text: #E8E8ED;
  --color-text-secondary: rgba(232, 232, 237, 0.7);
  --color-text-muted: rgba(232, 232, 237, 0.4);
  --font-display: 'Orbitron', sans-serif;
  --font-body: 'Noto Serif SC', serif;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --shadow-glow: 0 0 30px rgba(74, 158, 255, 0.15);
  --shadow-glow-strong: 0 0 60px rgba(74, 158, 255, 0.25);
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light mode */
[data-theme="light"] {
  --color-bg: #F0F0F5;
  --color-bg-alt: #E6E6EC;
  --color-surface: rgba(0, 0, 0, 0.03);
  --color-surface-hover: rgba(0, 0, 0, 0.06);
  --color-border: rgba(0, 0, 0, 0.10);
  --color-border-glow: rgba(74, 158, 255, 0.35);
  --color-primary: #3A8AE0;
  --color-primary-dim: rgba(58, 138, 224, 0.12);
  --color-accent-green: #00B883;
  --color-accent-orange: #E05A2A;
  --color-accent-purple: #8B6FDC;
  --color-text: #1E1E2E;
  --color-text-secondary: rgba(30, 30, 46, 0.72);
  --color-text-muted: rgba(30, 30, 46, 0.42);
  --shadow-glow: 0 0 30px rgba(74, 158, 255, 0.10);
  --shadow-glow-strong: 0 0 60px rgba(74, 158, 255, 0.18);
}
[data-theme="light"] .star { display: none; }
[data-theme="light"] .nav { background: linear-gradient(180deg, rgba(240, 240, 245, 0.95) 0%, rgba(240, 240, 245, 0) 100%); }
[data-theme="light"] .nav-search-results,
[data-theme="light"] .page-search-results { background: rgba(255, 255, 255, 0.98); border-color: rgba(0,0,0,0.10); box-shadow: 0 12px 40px rgba(0,0,0,0.12); }
[data-theme="light"] .mobile-bottom-search { background: rgba(240, 240, 245, 0.95); }
[data-theme="light"] @media (max-width: 480px) { .nav-links { background: rgba(255, 255, 255, 0.98); } }

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.8;
  overflow-x: hidden;
  min-height: 100vh;
}

#particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.star {
  position: absolute;
  background: white;
  border-radius: 50%;
  animation: twinkle var(--duration) ease-in-out infinite;
  animation-delay: var(--delay);
  opacity: 0;
}

@keyframes twinkle {
  0%, 100% { opacity: 0.2; }
  50% { opacity: var(--brightness); }
}

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: linear-gradient(180deg, rgba(10, 10, 15, 0.95) 0%, rgba(10, 10, 15, 0) 100%);
  backdrop-filter: blur(10px);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2vw, 1.5rem);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: 0.1em;
  transition: text-shadow var(--transition-fast);
}

.nav-logo:hover {
  text-shadow: 0 0 20px rgba(74, 158, 255, 0.5);
}

.nav-links {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.nav-link {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  transition: all var(--transition-fast);
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
  border-color: var(--color-border-glow);
  background: var(--color-primary-dim);
  box-shadow: 0 0 15px rgba(74, 158, 255, 0.1);
}

.nav-link.space-link:hover,
.nav-link.space-link.active {
  color: var(--color-primary);
  border-color: rgba(74, 158, 255, 0.4);
  background: rgba(74, 158, 255, 0.1);
}

.nav-link.time-link:hover,
.nav-link.time-link.active {
  color: var(--color-accent-orange);
  border-color: rgba(255, 107, 53, 0.4);
  background: rgba(255, 107, 53, 0.1);
}

.nav-link.energy-link:hover,
.nav-link.energy-link.active {
  color: var(--color-accent-green);
  border-color: rgba(0, 229, 160, 0.4);
  background: rgba(0, 229, 160, 0.1);
}

/* Nav search */
.nav-search {
  position: relative;
  margin-left: 8px;
}

.nav-search-input {
  width: 180px;
  padding: 8px 14px 8px 34px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.03em;
  outline: none;
  transition: all var(--transition-smooth);
}

.nav-search-input::placeholder {
  color: var(--color-text-muted);
}

.nav-search-input:focus {
  width: 260px;
  border-color: rgba(168, 85, 247, 0.4);
  background: rgba(168, 85, 247, 0.06);
  box-shadow: 0 0 20px rgba(168, 85, 247, 0.1);
}

.nav-search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 0.8rem;
  opacity: 0.5;
  pointer-events: none;
}

.nav-search-results {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 360px;
  max-height: 400px;
  overflow-y: auto;
  background: rgba(20, 20, 30, 0.98);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
  display: none;
  z-index: 200;
}

.nav-search-results.active {
  display: block;
}

.nav-search-result-item,
.page-search-result-item,
.mobile-bottom-search-result-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  cursor: pointer;
  transition: background var(--transition-fast);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.nav-search-result-item:last-child,
.page-search-result-item:last-child,
.mobile-bottom-search-result-item:last-child {
  border-bottom: none;
}

.nav-search-result-item:hover,
.page-search-result-item:hover,
.mobile-bottom-search-result-item:hover {
  background: rgba(168, 85, 247, 0.1);
}

.nav-search-result-icon,
.page-search-result-icon,
.mobile-bottom-search-result-icon {
  font-size: 1.1rem;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  flex-shrink: 0;
}

.nav-search-result-name,
.page-search-result-name,
.mobile-bottom-search-result-name {
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--color-text);
  letter-spacing: 0.03em;
}

.nav-search-result-scale,
.page-search-result-scale,
.mobile-bottom-search-result-scale {
  font-family: var(--font-display);
  font-size: 0.65rem;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  margin-left: auto;
  flex-shrink: 0;
}

.nav-search-no-results,
.page-search-no-results,
.mobile-bottom-search-no-results {
  padding: 20px;
  text-align: center;
  color: var(--color-text-muted);
  font-family: var(--font-display);
  font-size: 0.8rem;
}

/* Theme toggle */
.theme-toggle {
  width: 34px;
  height: 34px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: all var(--transition-fast);
  flex-shrink: 0;
  margin-left: 8px;
  line-height: 1;
}
.theme-toggle:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border-glow);
  box-shadow: 0 0 12px rgba(168, 85, 247, 0.15);
}

@media (max-width: 767px) {
  .nav-search {
    margin-left: 0;
    width: 100%;
  }
  .nav-search-input {
    width: 100%;
  }
  .nav-search-input:focus {
    width: 100%;
  }
  .nav-search-results {
    width: 100%;
    right: auto;
    left: 0;
  }
}

.page-wrapper {
  position: relative;
  z-index: 1;
  min-height: 100vh;
}

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 120px 24px 80px;
  text-align: center;
  position: relative;
}

.hero-icon {
  font-size: clamp(3rem, 6vw, 5rem);
  margin-bottom: 24px;
  animation: float 6s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 900;
  letter-spacing: 0.15em;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent-green) 50%, var(--color-accent-purple) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
  animation: glowPulse 3s ease-in-out infinite;
}

@keyframes glowPulse {
  0%, 100% { filter: brightness(1); }
  50% { filter: brightness(1.3); }
}

.hero-subtitle {
  font-family: var(--font-display);
  font-size: clamp(0.9rem, 1.5vw, 1.2rem);
  font-weight: 400;
  color: var(--color-text-secondary);
  letter-spacing: 0.3em;
  margin-bottom: 8px;
}

.hero-desc {
  font-size: clamp(0.9rem, 1.2vw, 1.05rem);
  color: var(--color-text-muted);
  max-width: 600px;
  line-height: 1.9;
  margin-bottom: 48px;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1000px;
  width: 100%;
  padding: 0 16px;
}

.card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px 28px;
  text-decoration: none;
  color: var(--color-text);
  transition: all var(--transition-smooth);
  overflow: hidden;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 16px;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: var(--radius-lg);
  opacity: 0;
  transition: opacity var(--transition-smooth);
  z-index: 0;
}

.card.space-card::before {
  background: radial-gradient(circle at 50% 0%, rgba(74, 158, 255, 0.1), transparent 70%);
}

.card.time-card::before {
  background: radial-gradient(circle at 50% 0%, rgba(255, 107, 53, 0.1), transparent 70%);
}

.card.energy-card::before {
  background: radial-gradient(circle at 50% 0%, rgba(0, 229, 160, 0.1), transparent 70%);
}

.card:hover {
  transform: translateY(-8px);
  border-color: var(--color-border-glow);
  box-shadow: var(--shadow-glow);
}

.card:hover::before {
  opacity: 1;
}

.card.space-card:hover {
  border-color: rgba(74, 158, 255, 0.4);
  box-shadow: 0 0 40px rgba(74, 158, 255, 0.2);
}

.card.time-card:hover {
  border-color: rgba(255, 107, 53, 0.4);
  box-shadow: 0 0 40px rgba(255, 107, 53, 0.2);
}

.card.energy-card:hover {
  border-color: rgba(0, 229, 160, 0.4);
  box-shadow: 0 0 40px rgba(0, 229, 160, 0.2);
}

.card-icon {
  font-size: 2.8rem;
  position: relative;
  z-index: 1;
  transition: transform var(--transition-smooth);
}

.card:hover .card-icon {
  transform: scale(1.15);
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  position: relative;
  z-index: 1;
}

.card-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

.card-arrow {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--color-text-muted);
  position: relative;
  z-index: 1;
  transition: all var(--transition-fast);
  padding: 6px 0;
}

.card:hover .card-arrow {
  color: var(--color-primary);
}

/* ===== Category Filter ===== */
.category-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 32px;
}
.category-filter-btn {
  font-family: var(--font-display);
  font-size: 0.7rem;
  padding: 6px 14px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px;
  color: var(--color-text-muted);
  cursor: pointer;
  letter-spacing: 0.04em;
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.category-filter-btn:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.15);
  color: var(--color-text);
}
.category-filter-btn.active {
  background: rgba(168,85,247,0.15);
  border-color: rgba(168,85,247,0.35);
  color: var(--color-primary);
}
.category-filter-count {
  font-size: 0.6rem;
  opacity: 0.5;
  margin-left: 4px;
}
.scale-node.filtered-out {
  display: none;
}

.scale-page {
  padding: 120px 24px 80px;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.page-header {
  text-align: center;
  margin-bottom: 80px;
  animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}

.page-title.space-title {
  color: var(--color-primary);
}

.page-title.time-title {
  color: var(--color-accent-orange);
}

.page-title.energy-title {
  color: var(--color-accent-green);
}

.page-subtitle {
  font-family: var(--font-display);
  font-size: clamp(0.8rem, 1.2vw, 0.95rem);
  color: var(--color-text-secondary);
  letter-spacing: 0.15em;
  margin-bottom: 24px;
}

.page-desc {
  font-size: clamp(0.9rem, 1.1vw, 1rem);
  color: var(--color-text-muted);
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.9;
}

.scale-axis-container {
  position: relative;
  display: flex;
  gap: 24px;
  width: 100%;
}

.scale-nodes {
  display: flex;
  flex-direction: column;
  flex: 1;
  position: relative;
}

.scale-nodes::before {
  content: '';
  position: absolute;
  left: 82px;
  top: 0;
  bottom: 0;
  width: 2px;
  border-radius: 1px;
  background: linear-gradient(180deg, var(--color-primary) 0%, var(--color-accent-green) 40%, var(--color-accent-orange) 70%, var(--color-accent-purple) 100%);
  opacity: 0.3;
  z-index: 0;
}

.scale-node {
  display: flex;
  align-items: flex-start;
  gap: 24px;
  padding: 32px 0;
  position: relative;
  opacity: 0.35;
  transition: opacity var(--transition-smooth);
  cursor: pointer;
}

.scale-node.visible {
  opacity: 1;
}

.scale-node:hover {
  opacity: 1;
}

.node-marker {
  position: relative;
  width: 90px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 6px;
}

.axis-label {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-size: 0.6rem;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
  white-space: nowrap;
  z-index: 1;
}

.node-dot {
  position: absolute;
  right: 0;
  top: 0;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 12px rgba(74, 158, 255, 0.5);
  transition: all var(--transition-fast);
  z-index: 2;
}

.scale-node.visible .node-dot {
  box-shadow: 0 0 20px rgba(74, 158, 255, 0.7);
}

.scale-node:hover .node-dot {
  transform: scale(1.5);
  box-shadow: 0 0 30px rgba(74, 158, 255, 0.9);
}

.node-line {
  position: absolute;
  top: 16px;
  left: 81px;
  width: 2px;
  height: calc(100% + 64px);
  background: linear-gradient(180deg, var(--color-primary-dim), var(--color-border), var(--color-primary-dim));
  z-index: 1;
}

.scale-node:last-child .node-line {
  display: none;
}

.node-card {
  flex: 1;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px;
  transition: all var(--transition-smooth);
  max-width: 700px;
  cursor: pointer;
}

.scale-node:hover .node-card {
  border-color: var(--color-border-glow);
  box-shadow: var(--shadow-glow);
  background: var(--color-surface-hover);
}

.node-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.node-icon {
  font-size: 1.5rem;
}

.node-name {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.node-name-en {
  font-family: var(--font-display);
  font-size: 0.7rem;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  margin-left: 4px;
}

.node-tag {
  font-family: var(--font-display);
  font-size: 0.6rem;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 20px;
  letter-spacing: 0.1em;
  margin-left: auto;
}

.tag-space {
  background: rgba(74, 158, 255, 0.15);
  color: var(--color-primary);
  border: 1px solid rgba(74, 158, 255, 0.3);
}

.tag-time {
  background: rgba(255, 107, 53, 0.15);
  color: var(--color-accent-orange);
  border: 1px solid rgba(255, 107, 53, 0.3);
}

.tag-energy {
  background: rgba(0, 229, 160, 0.15);
  color: var(--color-accent-green);
  border: 1px solid rgba(0, 229, 160, 0.3);
}

.node-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.node-meta-item {
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
}

.node-meta-value {
  color: var(--color-primary);
  font-weight: 600;
}

.node-desc {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

/* ===== 尺度对比卡片 ===== */
.scale-comparison {
  display: flex;
  align-items: stretch;
  margin-left: 0;
  padding: 0 0 0 0;
  position: relative;
  opacity: 0.35;
  transition: opacity var(--transition-smooth);
}

.scale-comparison.visible {
  opacity: 1;
}

.scale-comparison:hover {
  opacity: 1;
}

.comparison-connector {
  position: relative;
  width: 90px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.comparison-line {
  position: absolute;
  left: 81px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg,
    rgba(74, 158, 255, 0.05) 0%,
    rgba(168, 85, 247, 0.2) 30%,
    rgba(168, 85, 247, 0.2) 70%,
    rgba(74, 158, 255, 0.05) 100%
  );
  border-radius: 1px;
}

.comparison-card {
  flex: 1;
  padding: 16px;
  margin: 8px 0 8px 0;
  margin-left: 24px;
  max-width: 700px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  transition: all var(--transition-smooth);
  cursor: pointer;
}

.comparison-card:hover {
  opacity: 0.85;
}

.comparison-visual {
  position: relative;
  width: 100%;
  max-width: 400px;
  min-height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 8px;
}

.comp-from-icon {
  font-size: 2rem;
  opacity: 0.5;
  transition: all var(--transition-smooth);
  flex-shrink: 0;
}

.comp-to-icon {
  font-size: 2rem;
  opacity: 0.9;
  transition: all var(--transition-smooth);
  flex-shrink: 0;
  filter: drop-shadow(0 0 12px rgba(168, 85, 247, 0.4));
}

.comparison-card:hover .comp-from-icon {
  opacity: 0.7;
  transform: scale(1.1);
}

.comparison-card:hover .comp-to-icon {
  transform: scale(1.1);
  filter: drop-shadow(0 0 20px rgba(168, 85, 247, 0.6));
}

.comp-divider {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 0 8px;
  flex-shrink: 0;
}

.comp-arrow {
  font-size: 1.2rem;
  color: rgba(168, 85, 247, 0.5);
  transition: all var(--transition-smooth);
}

.comparison-card:hover .comp-arrow {
  color: rgba(168, 85, 247, 0.8);
  transform: scale(1.2);
}

.comp-ratio-badge {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-accent-purple);
  letter-spacing: 0.05em;
  padding: 3px 10px;
  background: rgba(168, 85, 247, 0.12);
  border-radius: 20px;
  border: 1px solid rgba(168, 85, 247, 0.25);
  white-space: nowrap;
  transition: all var(--transition-smooth);
}

.comparison-card:hover .comp-ratio-badge {
  background: rgba(168, 85, 247, 0.2);
  border-color: rgba(168, 85, 247, 0.4);
}

.comp-from-name,
.comp-to-name {
  font-family: var(--font-display);
  font-size: 0.7rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.05em;
  flex-shrink: 0;
  white-space: nowrap;
}

.comp-from-name {
  margin-right: 4px;
}

.comp-to-name {
  margin-left: 4px;
}

.timeline-node .node-marker {
  margin-top: 6px;
}

.timeline-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-accent-orange);
  box-shadow: 0 0 12px rgba(255, 107, 53, 0.5);
  transition: all var(--transition-fast);
  position: relative;
  z-index: 2;
}

.scale-node:hover .timeline-dot {
  transform: scale(1.5);
  box-shadow: 0 0 30px rgba(255, 107, 53, 0.9);
}

.energy-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-accent-green);
  box-shadow: 0 0 12px rgba(0, 229, 160, 0.5);
  transition: all var(--transition-fast);
  position: relative;
  z-index: 2;
}

.scale-node:hover .energy-dot {
  transform: scale(1.5);
  box-shadow: 0 0 30px rgba(0, 229, 160, 0.9);
}

.energy-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 8px 0;
}

.energy-bar-fill {
  height: 4px;
  border-radius: 2px;
  transition: width var(--transition-slow);
}

.energy-bar-label {
  font-family: var(--font-display);
  font-size: 0.65rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

.footer {
  text-align: center;
  padding: 60px 24px;
  color: var(--color-text-muted);
  font-size: 0.8rem;
  position: relative;
  z-index: 1;
}

.footer a {
  color: var(--color-primary);
  text-decoration: none;
}

.footer a:hover {
  text-decoration: underline;
}

@media (max-width: 1023px) {
  .cards-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
  }

  .scale-axis-container {
    flex-direction: row;
    gap: 16px;
  }

  .scale-nodes::before {
    left: 72px;
  }

  .scale-node {
    gap: 16px;
    padding: 24px 0;
  }

  .node-marker {
    width: 80px;
  }

  .node-line {
    left: 71px;
  }

  .node-card {
    padding: 20px;
  }

  .node-card-header {
    flex-wrap: wrap;
  }

  .node-tag {
    margin-left: 0;
  }

  .comparison-card {
    padding: 18px;
    margin-left: 16px;
  }

  .comparison-visual {
    max-width: 300px;
    min-height: 60px;
  }

  .comparison-connector {
    width: 80px;
  }

  .comparison-line {
    left: 71px;
  }

  .comp-from-icon {
    font-size: 1.5rem;
  }

  .comp-to-icon {
    font-size: 3rem;
  }
}

@media (max-width: 767px) {
  .nav {
    padding: 12px 16px;
  }

  .nav-links {
    gap: 4px;
  }

  .nav-link {
    font-size: 0.65rem;
    padding: 6px 10px;
    letter-spacing: 0.03em;
  }

  .hero {
    padding: 100px 16px 60px;
  }

  .cards-grid {
    gap: 16px;
  }

  .card {
    padding: 28px 20px;
  }

  .scale-axis-container {
    gap: 12px;
  }

  .scale-nodes::before {
    left: 63px;
  }

  .scale-node {
    gap: 12px;
    padding: 20px 0;
  }

  .node-marker {
    width: 70px;
    height: 12px;
    margin-top: 5px;
  }

  .axis-label {
    font-size: 0.5rem;
  }

  .node-dot,
  .timeline-dot,
  .energy-dot {
    width: 12px;
    height: 12px;
  }

  .node-line {
    left: 63px;
    width: 2px;
    height: calc(100% + 40px);
  }

  .node-card {
    padding: 16px;
  }

  .node-name {
    font-size: 0.9rem;
  }

  .node-desc {
    font-size: 0.8rem;
  }

  .comparison-card {
    padding: 14px;
    margin-left: 12px;
    gap: 12px;
  }

  .comparison-visual {
    max-width: 250px;
    min-height: 60px;
  }

  .comparison-connector {
    width: 70px;
  }

  .comparison-line {
    left: 63px;
  }

  .comp-from-icon {
    font-size: 1.3rem;
  }

  .comp-to-icon {
    font-size: 2.4rem;
  }

  .comp-ratio-badge {
    font-size: 0.6rem;
    padding: 2px 8px;
  }

  .comp-from-name,
  .comp-to-name {
    font-size: 0.6rem;
  }

  .page-title {
    font-size: 1.8rem;
  }

  .scale-page {
    padding: 100px 12px 60px;
  }

  .page-header {
    margin-bottom: 40px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 38px;
    height: 38px;
  }
}

/* Mobile hamburger menu */
.nav-menu-toggle {
  display: none;
  width: 32px;
  height: 32px;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  cursor: pointer;
  position: relative;
  align-items: center;
  justify-content: center;
}
.nav-menu-toggle span,
.nav-menu-toggle span::before,
.nav-menu-toggle span::after {
  display: block;
  background: var(--color-text-secondary);
  width: 16px;
  height: 2px;
  border-radius: 1px;
  transition: all var(--transition-fast);
}
.nav-menu-toggle span::before,
.nav-menu-toggle span::after {
  content: '';
  position: absolute;
}
.nav-menu-toggle span::before { top: 8px; }
.nav-menu-toggle span::after { bottom: 8px; }
.nav-menu-toggle.active span { background: transparent; }
.nav-menu-toggle.active span::before { transform: rotate(45deg); top: 15px; }
.nav-menu-toggle.active span::after { transform: rotate(-45deg); bottom: 15px; }
.nav-menu-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 98;
}
.nav-menu-overlay.active { display: block; }

@media (max-width: 480px) {
  .nav { padding: 12px 16px; }
  .nav-links {
    position: fixed;
    top: 56px;
    left: 16px;
    right: 16px;
    background: rgba(18, 18, 26, 0.98);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.6);
    padding: 12px;
    flex-direction: column;
    gap: 8px;
    display: none;
    z-index: 99;
  }
  .nav-links.active { display: flex; }
  .nav-menu-toggle { display: flex; }
  .nav-search {
    margin-left: 0;
    width: 100%;
    margin-top: 8px;
    display: none;
  }

  .nav-link {
    flex-shrink: 0;
  }

  .hero-title {
    font-size: 2rem;
  }

  .card {
    padding: 20px 16px;
  }

  .card-icon {
    font-size: 2rem;
  }

  .scale-node {
    gap: 8px;
    padding: 16px 0;
  }

  .scale-nodes::before {
    left: 53px;
  }

  .node-marker {
    width: 60px;
    height: 12px;
    margin-top: 5px;
  }

  .axis-label {
    font-size: 0.45rem;
  }

  .node-line {
    left: 53px;
    height: calc(100% + 32px);
  }

  .node-card {
    padding: 14px;
    border-radius: var(--radius-sm);
  }

  .node-meta {
    gap: 8px;
  }

  .comparison-card {
    padding: 12px;
    margin-left: 8px;
    gap: 10px;
  }

  .comparison-visual {
    max-width: 200px;
    min-height: 50px;
  }

  .comp-from-icon {
    font-size: 1.1rem;
  }

  .comp-to-icon {
    font-size: 1.8rem;
  }

  .comp-arrow {
    font-size: 0.9rem;
  }

  .comp-ratio-badge {
    font-size: 0.55rem;
    padding: 2px 6px;
  }

  .comp-from-name,
  .comp-to-name {
    font-size: 0.55rem;
  }

  .comparison-connector {
    width: 60px;
  }

  .comparison-line {
    left: 53px;
    width: 1.5px;
  }

  .page-search {
    max-width: 100%;
    padding: 0 12px;
  }
}

/* Mobile bottom search bar */
.mobile-bottom-search {
  display: none;
}

@media (max-width: 768px) {
  .nav-search {
    display: none !important;
  }

  .mobile-bottom-search {
    display: block;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 10px 16px;
    padding-bottom: max(10px, env(safe-area-inset-bottom));
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--color-border);
  }

  .mobile-bottom-search-wrapper {
    position: relative;
    max-width: 480px;
    margin: 0 auto;
  }

  .mobile-bottom-search-input {
    width: 100%;
    padding: 10px 14px 10px 38px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 22px;
    color: var(--color-text);
    font-family: var(--font-display);
    font-size: 0.8rem;
    letter-spacing: 0.03em;
    outline: none;
    transition: all var(--transition-smooth);
  }

  .mobile-bottom-search-input::placeholder {
    color: var(--color-text-muted);
  }

  .mobile-bottom-search-input:focus {
    border-color: rgba(168, 85, 247, 0.5);
    background: rgba(168, 85, 247, 0.08);
    box-shadow: 0 0 20px rgba(168, 85, 247, 0.1);
  }

  .mobile-bottom-search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.85rem;
    opacity: 0.5;
    pointer-events: none;
  }

  .mobile-bottom-search-results {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 0;
    right: 0;
    max-height: 280px;
    overflow-y: auto;
    background: rgba(20, 20, 30, 0.98);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.5);
    display: none;
    z-index: 101;
  }

  .mobile-bottom-search-results.active {
    display: block;
  }

  .mobile-bottom-search-no-results {
    padding: 16px;
    text-align: center;
    color: var(--color-text-muted);
    font-family: var(--font-display);
    font-size: 0.75rem;
  }

  .page-wrapper {
    padding-bottom: 70px;
  }

  .back-to-top {
    bottom: 80px;
  }
}

/* Back to top button */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(168, 85, 247, 0.15);
  border: 1px solid rgba(168, 85, 247, 0.3);
  color: var(--color-accent-purple);
  font-size: 1.2rem;
  cursor: pointer;
  z-index: 100;
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition-smooth);
  pointer-events: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-to-top.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.back-to-top:hover {
  background: rgba(168, 85, 247, 0.25);
  border-color: rgba(168, 85, 247, 0.5);
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(168, 85, 247, 0.2);
}

/* ===== Page Search ===== */
.page-search {
  display: flex;
  justify-content: center;
  margin: 0 auto 48px;
  max-width: 520px;
  width: 100%;
}
.page-search-wrapper {
  position: relative;
  width: 100%;
}
.page-search-input {
  width: 100%;
  padding: 14px 20px 14px 48px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 28px;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
  outline: none;
  transition: all var(--transition-smooth);
}
.page-search-input::placeholder {
  color: var(--color-text-muted);
}
.page-search-input:focus {
  border-color: rgba(168, 85, 247, 0.5);
  background: rgba(168, 85, 247, 0.06);
  box-shadow: 0 0 30px rgba(168, 85, 247, 0.12);
}
.page-search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1rem;
  opacity: 0.5;
  pointer-events: none;
}
.page-search-hint {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-size: 0.6rem;
  color: var(--color-text-muted);
  opacity: 0.35;
  pointer-events: none;
  padding: 2px 8px;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px;
  letter-spacing: 0.05em;
  transition: opacity var(--transition-fast);
}
.page-search-input:focus ~ .page-search-hint,
.page-search-input:not(:placeholder-shown) ~ .page-search-hint {
  opacity: 0;
}
.page-search-results {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  max-height: 360px;
  overflow-y: auto;
  background: rgba(20, 20, 30, 0.98);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
  display: none;
  z-index: 50;
}
.page-search-results.active {
  display: block;
}


/* ===== Accessibility ===== */
.skip-to-content {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 200;
  padding: 12px 20px;
  background: var(--color-primary);
  color: #000;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: top var(--transition-fast);
}
.skip-to-content:focus {
  top: 10px;
}
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ===== Loading Skeleton ===== */
.skeleton {
  background: linear-gradient(90deg, rgba(255,255,255,0.03) 25%, rgba(255,255,255,0.06) 50%, rgba(255,255,255,0.03) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}
.skeleton-header {
  height: 80px;
  border-radius: var(--radius-md);
  margin-bottom: 32px;
}
.skeleton-icon {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-md);
  margin-bottom: 16px;
}
.skeleton-line {
  height: 16px;
  margin-bottom: 12px;
  width: 100%;
}
.skeleton-line.short { width: 60%; }
.skeleton-line.medium { width: 80%; }
.skeleton-section {
  margin-bottom: 40px;
}
.skeleton-section-title {
  height: 20px;
  width: 120px;
  margin-bottom: 16px;
}
.skeleton-text {
  height: 14px;
  margin-bottom: 10px;
}
.skeleton-text:last-child { width: 70%; }

/* ===== Page Transition ===== */
.page-content {
  animation: pageFadeIn 0.5s ease-out;
}
@keyframes pageFadeIn {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Keyboard Shortcut Hint ===== */
.nav-search-hint {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-size: 0.6rem;
  color: var(--color-text-muted);
  opacity: 0.4;
  pointer-events: none;
  transition: opacity var(--transition-fast);
  padding: 2px 6px;
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 4px;
  letter-spacing: 0.05em;
}
.nav-search-input:focus ~ .nav-search-hint,
.nav-search-input:not(:placeholder-shown) ~ .nav-search-hint {
  opacity: 0;
}

/* ===== Error / Retry State ===== */
.error-state {
  text-align: center;
  padding: 60px 20px;
}
.error-state-icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
  opacity: 0.6;
}
.error-state-text {
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}
.error-state-btn {
  font-family: var(--font-display);
  font-size: 0.8rem;
  padding: 10px 24px;
  background: rgba(74,158,255,0.1);
  border: 1px solid rgba(74,158,255,0.3);
  color: var(--color-primary);
  border-radius: 20px;
  cursor: pointer;
  letter-spacing: 0.05em;
  transition: all var(--transition-fast);
}
.error-state-btn:hover {
  background: rgba(74,158,255,0.2);
  border-color: rgba(74,158,255,0.5);
}

/* ===== Audio Cue (hidden) ===== */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ===== Reading Progress Bar ===== */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-purple), var(--color-accent-green));
  z-index: 200;
  transition: width 0.1s ease-out;
  border-radius: 0 2px 2px 0;
  box-shadow: 0 0 8px rgba(168, 85, 247, 0.3);
}