/* ================================================================
   RESET & BASE
   ================================================================ */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg: #09090b;
  --bg-elevated: #111114;
  --bg-card: rgba(255,255,255,0.03);
  --border: rgba(255,255,255,0.06);
  --border-hover: rgba(255,255,255,0.12);
  --text: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --accent-orange: #FF4500;
  --accent-cyan: #00CED1;
  --gradient: linear-gradient(135deg, #FF4500, #00CED1);
  --gradient-subtle: linear-gradient(135deg, rgba(255,69,0,0.15), rgba(0,206,209,0.15));
  --glass: rgba(255,255,255,0.04);
  --glass-border: rgba(255,255,255,0.08);
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  /* Theme-aware surface overlays */
  --overlay-faint: rgba(255,255,255,0.02);
  --overlay-subtle: rgba(255,255,255,0.03);
  --overlay-light: rgba(255,255,255,0.04);
  --overlay-medium: rgba(255,255,255,0.05);
  --overlay-strong: rgba(255,255,255,0.06);
  --nav-bg: rgba(9,9,11,0.8);
  --nav-bg-mobile: rgba(9,9,11,0.95);
  --gradient-card-bg: rgba(9,9,11,0.55);
  --gradient-card-bg-hover: rgba(9,9,11,0.35);
  --gradient-card-border: rgba(255,255,255,0.12);
  --grid-line: rgba(255,255,255,0.02);
  --shadow-card: rgba(0,0,0,0.3);
  color-scheme: dark;
}

[data-theme="light"] {
  --bg: #ffffff;
  --bg-elevated: #f4f4f5;
  --bg-card: rgba(0,0,0,0.02);
  --border: rgba(0,0,0,0.08);
  --border-hover: rgba(0,0,0,0.15);
  --text: #18181b;
  --text-secondary: #52525b;
  --text-muted: #a1a1aa;
  --accent-orange: #e03d00;
  --accent-cyan: #0097a7;
  --gradient: linear-gradient(135deg, #e03d00, #0097a7);
  --gradient-subtle: linear-gradient(135deg, rgba(224,61,0,0.1), rgba(0,151,167,0.1));
  --glass: rgba(0,0,0,0.03);
  --glass-border: rgba(0,0,0,0.06);
  --overlay-faint: rgba(0,0,0,0.02);
  --overlay-subtle: rgba(0,0,0,0.03);
  --overlay-light: rgba(0,0,0,0.03);
  --overlay-medium: rgba(0,0,0,0.04);
  --overlay-strong: rgba(0,0,0,0.05);
  --nav-bg: rgba(255,255,255,0.85);
  --nav-bg-mobile: rgba(255,255,255,0.95);
  --gradient-card-bg: rgba(255,255,255,0.7);
  --gradient-card-bg-hover: rgba(255,255,255,0.5);
  --gradient-card-border: rgba(0,0,0,0.1);
  --grid-line: rgba(0,0,0,0.03);
  --shadow-card: rgba(0,0,0,0.08);
  color-scheme: light;
}

/* Parameter Lab logo colors */
.pl-braces { color: #fafafa; }
.pl-nt { color: #a1a1aa; }
[data-theme="light"] .pl-braces { color: #18181b; }
[data-theme="light"] .pl-nt { color: #52525b; }

/* Light mode syntax highlighting overrides */
[data-theme="light"] .kw { color: #7c3aed; }
[data-theme="light"] .fn { color: #2563eb; }
[data-theme="light"] .st { color: #16a34a; }
[data-theme="light"] .cm { color: #9ca3af; }
[data-theme="light"] .cl { color: #d97706; }
[data-theme="light"] .op { color: #6b7280; }
[data-theme="light"] .ty { color: #db2777; }
[data-theme="light"] .dc { color: #7c3aed; }
[data-theme="light"] .nr { color: #ea580c; }
[data-theme="light"] .im { color: #4f46e5; }

/* Light mode selection */
[data-theme="light"] ::selection {
  background: rgba(224,61,0,0.2);
  color: #18181b;
}

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

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background 0.3s, color 0.3s;
}

a { color: inherit; text-decoration: none; }

::selection {
  background: rgba(255,69,0,0.3);
  color: #fff;
}

/* ================================================================
   UTILITY
   ================================================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 120px 0;
  position: relative;
}

.section-label {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 16px;
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.7;
}

/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ================================================================
   NAVBAR
   ================================================================ */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 24px;
  transition: background 0.3s, backdrop-filter 0.3s;
}
nav.scrolled {
  background: var(--nav-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 2px;
  font-size: 22px;
  font-weight: 900;
}
.nav-logo .mas {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nav-logo .eval {
  font-weight: 200;
  color: var(--text);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}
.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }
.nav-github {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.2s;
}
.nav-github:hover {
  border-color: var(--border-hover);
  color: var(--text);
  background: var(--glass);
}
.nav-github svg { width: 18px; height: 18px; }

/* Theme toggle */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: none;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
}
.theme-toggle:hover {
  border-color: var(--border-hover);
  color: var(--text);
  background: var(--glass);
}
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* Mobile hamburger */
.nav-toggle { display: none; background: none; border: none; color: var(--text); cursor: pointer; padding: 8px; }

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--nav-bg-mobile);
    backdrop-filter: blur(20px);
    padding: 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
  }
}

/* ================================================================
   HERO
   ================================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
}

/* Background gradient orbs */
.hero::before {
  content: '';
  position: absolute;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(255,69,0,0.08) 0%, transparent 60%);
  top: -200px;
  left: -200px;
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(0,206,209,0.06) 0%, transparent 60%);
  bottom: -300px;
  right: -200px;
  pointer-events: none;
}

.hero-content { position: relative; z-index: 1; max-width: 840px; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 32px;
  background: var(--glass);
  backdrop-filter: blur(10px);
}
a.hero-badge:hover {
  border-color: var(--border-hover);
  background: var(--overlay-strong);
}
.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: clamp(40px, 7vw, 76px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 24px;
}
.hero h1 .gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: clamp(17px, 2.2vw, 20px);
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 40px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  transition: all 0.25s var(--ease);
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 0 30px rgba(255,69,0,0.2);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 40px rgba(255,69,0,0.3);
}
.btn-secondary {
  background: var(--glass);
  color: var(--text);
  border: 1px solid var(--border);
  backdrop-filter: blur(10px);
}
.btn-secondary:hover {
  border-color: var(--border-hover);
  background: var(--overlay-strong);
  transform: translateY(-2px);
}
.btn svg { width: 18px; height: 18px; }

.hero-install {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 24px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  user-select: all;
}
.hero-install:hover {
  border-color: var(--border-hover);
  background: var(--overlay-light);
}
.hero-install .prompt { color: var(--accent-cyan); user-select: none; }
.hero-install .cmd { color: var(--text); }
.hero-install .copy-icon {
  color: var(--text-muted);
  transition: color 0.2s;
  user-select: none;
}
.hero-install:hover .copy-icon { color: var(--text-secondary); }

/* ================================================================
   FEATURES
   ================================================================ */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  margin-top: 48px;
}

.feature-card {
  padding: 36px 32px;
  background: var(--bg);
  transition: background 0.3s;
  position: relative;
}
.feature-card:hover {
  background: var(--bg-elevated);
}
.feature-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  background: var(--gradient-subtle);
  margin-bottom: 20px;
  font-size: 20px;
}
.feature-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}
.feature-card code {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 2px 6px;
  background: var(--overlay-strong);
  border-radius: 4px;
  color: var(--accent-cyan);
}

@media (max-width: 900px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .features-grid { grid-template-columns: 1fr; }
}

/* ================================================================
   CODE EXAMPLE
   ================================================================ */
.code-section { background: var(--bg-elevated); }

.code-container {
  margin-top: 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.code-block {
  position: relative;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  background: var(--bg);
}
.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--overlay-faint);
}
.code-block-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.code-block-title .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}
.code-block pre {
  padding: 20px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
  tab-size: 4;
}

/* Syntax highlighting */
.kw { color: #c084fc; }  /* keywords */
.fn { color: #60a5fa; }  /* functions */
.st { color: #86efac; }  /* strings */
.cm { color: #52525b; }  /* comments */
.cl { color: #fbbf24; }  /* class names */
.op { color: #71717a; }  /* operators */
.ty { color: #f472b6; }  /* types */
.dc { color: #a78bfa; }  /* decorators */
.nr { color: #fb923c; }  /* numbers */
.im { color: #818cf8; }  /* import names */

/* Code tabs */
.code-tabs {
  display: flex;
  gap: 0;
  margin-top: 48px;
  margin-bottom: 0;
  border-bottom: 1px solid var(--border);
}
.code-tab {
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  cursor: pointer;
  border: none;
  background: none;
  position: relative;
  transition: color 0.2s;
}
.code-tab:hover { color: var(--text-secondary); }
.code-tab.active {
  color: var(--text);
}
.code-tab.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient);
}
.code-tab-content {
  display: none;
}
.code-tab-content.active {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 24px;
}

@media (max-width: 900px) {
  .code-container { grid-template-columns: 1fr; }
  .code-tab-content.active { grid-template-columns: 1fr; }
}

/* ================================================================
   ARCHITECTURE
   ================================================================ */
.arch-visual {
  margin-top: 48px;
  position: relative;
}

.arch-diagram {
  display: flex;
  flex-direction: column;
  gap: 2px;
  max-width: 900px;
  margin: 0 auto;
}

.arch-layer {
  display: flex;
  align-items: center;
  border-radius: 12px;
  padding: 24px 32px;
  position: relative;
  transition: transform 0.3s var(--ease);
}
.arch-layer:hover { transform: scale(1.01); }

.arch-layer-user {
  background: var(--overlay-faint);
  border: 1px dashed var(--border);
}
.arch-layer-interface {
  background: rgba(96,165,250,0.06);
  border: 1px solid rgba(96,165,250,0.15);
}
.arch-layer-core {
  background: rgba(0,206,209,0.08);
  border: 1px solid rgba(0,206,209,0.2);
}
.arch-layer-bench {
  background: rgba(255,69,0,0.06);
  border: 1px solid rgba(255,69,0,0.15);
}

.arch-label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  min-width: 140px;
  flex-shrink: 0;
}
.arch-chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  flex: 1;
}
.arch-chip {
  padding: 5px 12px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 500;
  font-family: var(--font-mono);
  background: var(--overlay-medium);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  white-space: nowrap;
}
.arch-chip.yours {
  border-style: dashed;
  color: var(--text-muted);
}

.arch-connector {
  display: flex;
  justify-content: center;
  padding: 4px 0;
}
.arch-connector svg { color: var(--text-muted); }

@media (max-width: 600px) {
  .arch-layer { flex-direction: column; gap: 12px; padding: 16px 20px; }
  .arch-label { min-width: auto; }
}

/* ================================================================
   PIPELINE
   ================================================================ */
.pipeline {
  margin-top: 56px;
}
.pipeline-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 28px;
  text-align: center;
}
.pipeline-steps {
  display: flex;
  gap: 0;
  justify-content: center;
  flex-wrap: wrap;
}
.pipeline-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 20px 16px;
  position: relative;
  flex: 1;
  min-width: 140px;
  max-width: 200px;
}
.pipeline-step::after {
  content: '';
  position: absolute;
  top: 36px;
  right: -1px;
  width: 16px;
  height: 2px;
  background: var(--border);
}
.pipeline-step:last-child::after { display: none; }

.pipeline-num {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 12px;
  border: 2px solid;
}
.pipeline-step:nth-child(1) .pipeline-num { border-color: #60a5fa; color: #60a5fa; background: rgba(96,165,250,0.1); }
.pipeline-step:nth-child(2) .pipeline-num { border-color: #4ade80; color: #4ade80; background: rgba(74,222,128,0.1); }
.pipeline-step:nth-child(3) .pipeline-num { border-color: #facc15; color: #facc15; background: rgba(250,204,21,0.1); }
.pipeline-step:nth-child(4) .pipeline-num { border-color: #fb923c; color: #fb923c; background: rgba(251,146,60,0.1); }
.pipeline-step:nth-child(5) .pipeline-num { border-color: #c084fc; color: #c084fc; background: rgba(192,132,252,0.1); }

.pipeline-step h4 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 6px;
}
.pipeline-step p {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}
.pipeline-step code {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent-cyan);
}

@media (max-width: 700px) {
  .pipeline-steps { flex-direction: column; align-items: center; }
  .pipeline-step::after { display: none; }
  .pipeline-step { max-width: 100%; }
}

/* ================================================================
   COMPARISON TABLE
   ================================================================ */
.comparison { background: var(--bg-elevated); }

.table-wrapper {
  margin-top: 48px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  -webkit-overflow-scrolling: touch;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  white-space: nowrap;
}
.comparison-table thead {
  background: var(--overlay-subtle);
}
.comparison-table th {
  padding: 14px 16px;
  font-weight: 600;
  color: var(--text-secondary);
  text-align: center;
  border-bottom: 1px solid var(--border);
  font-size: 12px;
}
.comparison-table th:first-child {
  text-align: left;
  position: sticky;
  left: 0;
  background: var(--bg-elevated);
  z-index: 1;
}
.comparison-table td {
  padding: 12px 16px;
  text-align: center;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
}
.comparison-table td:first-child {
  text-align: left;
  font-weight: 600;
  color: var(--text);
  position: sticky;
  left: 0;
  background: var(--bg);
  z-index: 1;
}
.comparison-table tbody tr { background: var(--bg); }
.comparison-table tbody tr:hover { background: var(--overlay-faint); }
.comparison-table tbody tr:first-child td {
  background: rgba(255,69,0,0.04);
}
.comparison-table tbody tr:first-child td:first-child {
  background: rgba(255,69,0,0.06);
}
.comparison-table tbody tr:first-child {
  background: rgba(255,69,0,0.04);
}
.comparison-table tbody tr:last-child td { border-bottom: none; }

.table-legend {
  margin-top: 16px;
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  font-size: 12px;
  color: var(--text-muted);
}

/* ================================================================
   GETTING STARTED
   ================================================================ */
.getting-started-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: 48px;
}

.gs-card {
  padding: 32px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg-card);
  transition: border-color 0.3s;
}
.gs-card:hover { border-color: var(--border-hover); }

.gs-step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 16px;
}
.gs-card:nth-child(1) .gs-step { background: rgba(96,165,250,0.15); color: #60a5fa; }
.gs-card:nth-child(2) .gs-step { background: rgba(74,222,128,0.15); color: #4ade80; }
.gs-card:nth-child(3) .gs-step { background: rgba(250,204,21,0.15); color: #facc15; }
.gs-card:nth-child(4) .gs-step { background: rgba(192,132,252,0.15); color: #c084fc; }

.gs-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
}
.gs-card pre {
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-secondary);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
}

@media (max-width: 768px) {
  .getting-started-grid { grid-template-columns: 1fr; }
}

/* ================================================================
   AUTHORS & LINKS
   ================================================================ */
.links-section { background: var(--bg-elevated); }

.links-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 48px;
}
.link-card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--bg);
  text-align: center;
  transition: all 0.3s var(--ease);
  cursor: pointer;
}
.link-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px var(--shadow-card);
}
.link-card-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--gradient-subtle);
  font-size: 22px;
}
.link-card h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
}
.link-card p {
  font-size: 13px;
  color: var(--text-muted);
}

@media (max-width: 768px) {
  .links-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .links-grid { grid-template-columns: 1fr; }
}

.authors-list {
  margin-top: 48px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}
.author-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg);
  transition: all 0.2s;
}
.author-chip:hover {
  border-color: var(--border-hover);
  color: var(--text);
  background: var(--glass);
}
.author-aff {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 400;
}

/* ================================================================
   FOOTER
   ================================================================ */
footer {
  border-top: 1px solid var(--border);
  padding: 48px 24px;
}
.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
}
.footer-left { color: var(--text-muted); font-size: 13px; }
.footer-left a { color: var(--text-secondary); transition: color 0.2s; }
.footer-left a:hover { color: var(--text); }
.footer-right {
  display: flex;
  gap: 24px;
  font-size: 13px;
  color: var(--text-muted);
}
.footer-right a { color: var(--text-secondary); transition: color 0.2s; }
.footer-right a:hover { color: var(--text); }

/* ================================================================
   GRID BACKGROUND
   ================================================================ */
.grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  pointer-events: none;
}

/* ================================================================
   BENCHMARKS BAR
   ================================================================ */
.benchmarks-bar {
  display: flex;
  gap: 24px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.bench-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}
.bench-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

/* ================================================================
   SECTION DIVIDERS
   ================================================================ */
.section-divider {
  height: 1px;
  background: var(--border);
  margin: 0;
}

/* ================================================================
   COMPARISON TABLE: styled indicators (no emojis)
   ================================================================ */
.s-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.s-yes { background: #4ade80; }
.s-partial { background: #facc15; }
.s-no { background: #f87171; }

/* ================================================================
   GRADIENT LINK CARDS (open source section)
   ================================================================ */
.links-grid-gradient {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 48px;
  background: linear-gradient(135deg, rgba(255,69,0,0.35), rgba(0,206,209,0.35));
  background-clip: padding-box;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 6px;
}
.links-grid-gradient .link-card {
  border: none;
  background: var(--gradient-card-bg);
  backdrop-filter: blur(12px);
}
.links-grid-gradient .link-card:hover {
  background: var(--gradient-card-bg-hover);
}
@media (max-width: 768px) {
  .links-grid-gradient { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .links-grid-gradient { grid-template-columns: 1fr; }
}

/* ReadTheDocs button with icon and color */
.btn-docs {
  background: rgba(0,206,209,0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(0,206,209,0.3);
  backdrop-filter: blur(10px);
}
.btn-docs:hover {
  background: rgba(0,206,209,0.2);
  border-color: rgba(0,206,209,0.5);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,206,209,0.15);
}
.btn-docs svg { width: 18px; height: 18px; }

/* Feature icon SVG styling */
.feature-icon svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  color: var(--accent-cyan);
}

/* ================================================================
   TIMELINE
   ================================================================ */
.timeline-section {
  background: var(--bg-elevated);
  padding: 80px 0;
}
.timeline {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 0;
  margin-top: 48px;
  position: relative;
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}
.timeline::before {
  content: '';
  position: absolute;
  top: 23px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: var(--border);
}
.timeline-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  flex: 1;
  position: relative;
  padding: 0 8px;
}
.timeline-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 2px solid var(--border);
  background: var(--bg-elevated);
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
  transition: all 0.3s;
}
.timeline-item:hover .timeline-dot {
  border-color: var(--accent-orange);
  box-shadow: 0 0 12px rgba(255,69,0,0.3);
}
.timeline-item.active .timeline-dot {
  width: 20px;
  height: 20px;
  background: var(--gradient);
  border: 3px solid var(--accent-orange);
  box-shadow: 0 0 20px rgba(255,69,0,0.4);
}
.timeline-year {
  font-size: 13px;
  font-weight: 800;
  font-family: var(--font-mono);
  margin-bottom: 6px;
}
.timeline-item.active .timeline-year {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 15px;
}
.timeline-label {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 4px;
  line-height: 1.3;
}
.timeline-desc {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
  max-width: 160px;
}
.timeline-item.active .timeline-label {
  color: var(--text);
}
.timeline-item:not(.active) .timeline-label {
  color: var(--text-secondary);
}

@media (max-width: 700px) {
  .timeline {
    flex-direction: column;
    align-items: flex-start;
    gap: 24px;
    padding-left: 32px;
  }
  .timeline::before {
    top: 0;
    bottom: 0;
    left: 6px;
    right: auto;
    width: 2px;
    height: auto;
  }
  .timeline-item {
    flex-direction: row;
    text-align: left;
    gap: 16px;
    padding: 0;
  }
  .timeline-dot {
    margin-bottom: 0;
    flex-shrink: 0;
    position: absolute;
    left: -32px;
  }
  .timeline-desc { max-width: none; }
}