/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* GPTCode palette */
  --color-bg: #0c0d14;
  --color-bg-card: rgba(255, 255, 255, 0.03);
  --color-bg-code: #111219;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-text-secondary: #64748b;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.15);
  --color-primary: #7aa2f7;
  --color-primary-hover: #7dcfff;
  --color-accent: #10b981;
  --color-success: #10b981;
  --color-gradient: linear-gradient(135deg, #7aa2f7, #bb9af7);

  --font-sans: 'Space Grotesk', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Menlo', 'Monaco', 'Courier New', monospace;
  --nav-height: 56px;
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

/* Navigation */
.main-nav {
  position: sticky;
  top: 0;
  background: rgba(12, 13, 20, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  height: var(--nav-height);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 600;
  font-size: 16px;
  letter-spacing: -0.3px;
}

.nav-logo {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-sm);
}

.logo-accent {
  color: var(--color-accent);
}

.nav-links {
  display: flex;
  gap: var(--spacing-md);
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--color-text-muted);
  font-size: 13px;
  font-weight: 500;
  transition: color 0.2s;
}

.nav-links a:hover {
  color: var(--color-text);
  text-decoration: none;
}

.nav-live {
  padding: 6px 14px;
  background: var(--color-gradient);
  color: #0c0d14 !important;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 13px !important;
  transition: all 0.2s;
}

.nav-live:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(122, 162, 247, 0.25);
}

/* Main Content */
.main-content {
  max-width: 1100px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
  min-height: calc(100vh - var(--nav-height) - 80px);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 64px 0 80px;
}

.hero-kicker {
  display: inline-block;
  margin-bottom: var(--spacing-sm);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  font-size: clamp(40px, 6vw, 60px);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.03em;
  line-height: 1.1;
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 18px;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  margin-top: var(--spacing-lg);
}

.btn {
  display: inline-block;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  letter-spacing: -0.2px;
}

.btn-primary {
  background: var(--color-gradient);
  color: #0c0d14;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(122, 162, 247, 0.25);
  text-decoration: none;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-border-hover);
  background: rgba(255, 255, 255, 0.06);
  text-decoration: none;
}

.project-note {
  max-width: 760px;
  margin: 64px auto 24px;
  padding: var(--spacing-md);
  border-left: 3px solid var(--color-accent);
  background: var(--color-bg-card);
}

/* Homepage */
.hero h1 span {
  color: var(--color-text);
  -webkit-text-fill-color: var(--color-text);
}

.hero-meta {
  margin-top: var(--spacing-md);
  margin-bottom: 0 !important;
  font-family: var(--font-mono);
  font-size: 12px !important;
  color: var(--color-text-secondary) !important;
}

.section-label {
  margin-bottom: var(--spacing-sm);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.terminal-showcase {
  width: min(1050px, calc(100vw - 32px));
  margin: 0 50% 96px;
  transform: translateX(-50%);
}

.terminal-intro {
  max-width: 1100px;
  margin: 0 auto var(--spacing-lg);
}

.terminal-intro h2 {
  max-width: 760px;
  margin-top: 0;
  font-size: clamp(28px, 4vw, 42px);
}

.terminal-window {
  overflow: hidden;
  border: 1px solid var(--color-border-hover);
  border-radius: var(--radius-md);
  background: #090a10;
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.35);
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
  background: #11131c;
}

.terminal-bar span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #f7768e;
}

.terminal-bar span:nth-child(2) { background: #e0af68; }
.terminal-bar span:nth-child(3) { background: var(--color-success); }

.terminal-bar strong {
  margin-left: 8px;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
}

.terminal-recording {
  display: block;
  width: 100%;
  height: auto;
  background: #282a36;
}

.recording-caption {
  margin-top: 10px;
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  font-size: 10px;
  text-align: right;
}

.workflow-signature {
  display: flex;
  justify-content: center;
  gap: 14px;
  margin-top: var(--spacing-md);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 12px;
}

.workflow-signature b {
  color: var(--color-text-secondary);
  font-weight: 400;
}

.workflow-explainer {
  max-width: 720px;
  margin: var(--spacing-md) auto 0;
  color: var(--color-text-muted);
  font-size: 14px;
  text-align: center;
}

.workflow-explainer strong {
  color: var(--color-text);
}

.evidence-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: var(--spacing-lg);
  font-family: var(--font-mono);
  font-size: 11px;
}

.evidence-links > span {
  grid-column: 1 / -1;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.evidence-links a {
  display: grid;
  grid-template-columns: 18px 1fr;
  padding: var(--spacing-sm);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  text-decoration: none;
}

.evidence-links a:hover {
  border-color: var(--color-border-hover);
  text-decoration: none;
}

.evidence-links a b {
  grid-row: 1 / 3;
  color: var(--color-success);
}

.evidence-links a strong {
  color: var(--color-text);
  font-size: 12px;
}

.evidence-links a small {
  margin-top: 3px;
  color: var(--color-text-secondary);
}

.thesis-section,
.founder-note {
  max-width: 820px;
  margin: 112px auto;
}

.philosophy-section {
  max-width: 900px;
  margin: 112px auto;
  padding: var(--spacing-xl);
  border-top: 1px solid var(--color-border-hover);
  border-bottom: 1px solid var(--color-border-hover);
}

.philosophy-section p {
  margin: var(--spacing-md) 0;
  color: var(--color-text);
  font-size: clamp(24px, 4vw, 42px);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.25;
}

.philosophy-section h2 {
  max-width: 760px;
  margin: 0 0 56px;
  color: var(--color-text-muted);
  font-size: clamp(20px, 3vw, 30px);
  font-weight: 500;
  line-height: 1.35;
}

.philosophy-section p span {
  display: block;
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 0.36em;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.philosophy-section strong {
  display: block;
  margin-top: var(--spacing-lg);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
}

.thesis-section h2,
.founder-note h2,
.install-section h2 {
  max-width: 780px;
  margin-top: 0;
  font-size: clamp(34px, 5vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.thesis-section p,
.founder-note p {
  max-width: 720px;
  color: var(--color-text-muted);
  font-size: 18px;
}

.pillar-section,
.use-cases,
.architecture-section,
.skills-section,
.open-source-section,
.install-section {
  margin: 112px 0;
}

.pillar-section > h2,
.use-cases > h2 {
  max-width: 720px;
  margin-top: 0;
  font-size: clamp(30px, 4vw, 42px);
}

.pillar-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.pillar {
  padding: var(--spacing-lg);
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.pillar > span {
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  font-size: 11px;
}

.pillar h3 {
  margin-top: var(--spacing-md);
  font-size: 18px;
}

.pillar p,
.architecture-copy p,
.skills-section p,
.use-case-list p,
.open-source-section p,
.install-section > p {
  color: var(--color-text-muted);
}

.architecture-section,
.skills-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 72px;
  align-items: center;
}

.architecture-copy h2,
.skills-section h2,
.open-source-section h2 {
  margin-top: 0;
  font-size: clamp(28px, 4vw, 40px);
}

.pipeline-diagram {
  padding: var(--spacing-lg);
  border: 1px solid var(--color-border);
  background: var(--color-bg-code);
  font-family: var(--font-mono);
  font-size: 11px;
}

.pipeline-models {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
}

.pipeline-models small {
  flex-basis: 100%;
  margin-bottom: 2px;
  color: var(--color-text-secondary);
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.pipeline-repository,
.pipeline-models span {
  padding: 7px 11px;
  border: 1px solid var(--color-border-hover);
  color: var(--color-text-muted);
}

.pipeline-repository strong {
  display: block;
  margin-bottom: 8px;
  color: var(--color-accent);
}

.pipeline-repository div {
  display: grid;
  gap: 3px;
  padding-left: 8px;
}

.pipeline-arrow {
  padding: 10px;
  color: var(--color-text-secondary);
  text-align: center;
}

.pipeline-core {
  padding: var(--spacing-md);
  border: 1px solid rgba(122, 162, 247, 0.3);
  background: rgba(122, 162, 247, 0.04);
}

.pipeline-core > strong {
  display: block;
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
  text-align: center;
}

.pipeline-core > div {
  display: grid;
  justify-content: center;
  gap: 4px;
  color: var(--color-text-muted);
  text-align: center;
}

.pipeline-core b {
  color: var(--color-text-secondary);
  font-weight: 400;
}

.skill-example {
  overflow: hidden;
  border: 1px solid var(--color-border-hover);
  background: var(--color-bg-code);
}

.code-caption {
  padding: 10px 16px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
  font-size: 11px;
}

.skill-example pre {
  margin: 0;
  padding: var(--spacing-lg);
  border: 0;
}

.text-link {
  display: inline-block;
  margin-top: var(--spacing-sm);
  font-family: var(--font-mono);
  font-size: 13px;
}

.use-case-list {
  margin-top: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
}

.use-case-list article {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1.2fr);
  gap: var(--spacing-xl);
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.use-case-list h3 {
  margin: 0;
  font-size: 17px;
}

.use-case-list p {
  margin: 0;
}

.founder-note blockquote {
  margin: var(--spacing-lg) 0;
  padding: var(--spacing-md) 0 var(--spacing-md) var(--spacing-lg);
  color: var(--color-text);
  font-size: clamp(22px, 3vw, 30px);
  font-style: normal;
  line-height: 1.35;
}

.signature {
  margin-top: var(--spacing-lg);
  color: var(--color-text) !important;
  font-size: 15px !important;
}

.signature span { color: var(--color-text-secondary); }

.open-source-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: var(--spacing-xl);
  align-items: end;
  padding: var(--spacing-xl);
  border: 1px solid var(--color-border);
}

.project-facts {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  white-space: nowrap;
}

.project-facts span {
  margin: 0 8px;
  color: var(--color-text-secondary);
}

.install-section {
  padding: 80px clamp(24px, 7vw, 80px);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.install-section h2,
.install-section > p {
  margin-right: auto;
  margin-left: auto;
}

.install-section > p { max-width: 620px; }

.install-command {
  max-width: 760px;
  margin: var(--spacing-lg) auto;
  text-align: left;
}

/* Features Grid */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
  margin: 64px 0;
}

.feature-card {
  display: block;
  padding: var(--spacing-lg);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  text-decoration: none;
  color: inherit;
  backdrop-filter: blur(8px);
}

.feature-card:hover {
  border-color: rgba(122, 162, 247, 0.3);
  box-shadow: 0 8px 32px rgba(122, 162, 247, 0.08);
  transform: translateY(-3px);
  text-decoration: none;
}

.feature-card h3 {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
}

.feature-card p {
  color: var(--color-text-muted);
  margin-bottom: 0;
  font-size: 14px;
  line-height: 1.7;
}

/* Section */
.section {
  margin: 80px 0;
}

.section-title {
  font-size: clamp(28px, 4vw, 36px);
  margin-bottom: var(--spacing-lg);
  text-align: center;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-subtitle {
  color: var(--color-text-muted);
  text-align: center;
  font-size: 16px;
  max-width: 560px;
  margin: 0 auto var(--spacing-xl);
}

/* Workflow Steps */
.workflow-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-md);
}

.workflow-step {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  transition: border-color 0.2s;
}

.workflow-step:hover {
  border-color: var(--color-border-hover);
}

.workflow-step h3 {
  margin-top: 0;
  font-size: 16px;
  color: var(--color-primary);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.02em;
}

h1 { font-size: 36px; }
h2 { font-size: 28px; }
h3 { font-size: 22px; }
h4 { font-size: 18px; }

p {
  margin-bottom: var(--spacing-sm);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
}

strong, b {
  font-weight: 600;
}

/* Code */
code {
  font-family: var(--font-mono);
  font-size: 13px;
  background: var(--color-bg-code);
  padding: 3px 7px;
  border-radius: 4px;
  color: var(--color-primary);
  border: 1px solid var(--color-border);
}

pre {
  background: var(--color-bg-code);
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  overflow-x: auto;
  margin: var(--spacing-sm) 0;
  border: 1px solid var(--color-border);
}

pre code {
  background: none;
  padding: 0;
  border: none;
  color: var(--color-text);
}

/* Lists */
ul, ol {
  margin: var(--spacing-sm) 0;
  padding-left: var(--spacing-md);
}

li {
  margin: var(--spacing-xs) 0;
  color: var(--color-text-muted);
}

li strong {
  color: var(--color-text);
}

/* Blockquote */
blockquote {
  border-left: 3px solid var(--color-primary);
  padding-left: var(--spacing-sm);
  margin: var(--spacing-sm) 0;
  color: var(--color-text-muted);
  font-style: italic;
}

/* Horizontal Rule */
hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--spacing-lg) 0;
}

/* Tables */
table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--spacing-sm) 0;
}

th, td {
  padding: 12px;
  text-align: left;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
}

th {
  font-weight: 600;
  background: var(--color-bg-code);
  color: var(--color-text-muted);
  text-transform: uppercase;
  font-size: 11px;
  letter-spacing: 0.5px;
}

/* Quick Start Box */
.quick-start {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
  backdrop-filter: blur(8px);
}

.quick-start h3 {
  margin-top: 0;
  color: var(--color-accent);
}

/* Footer */
.main-footer {
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-lg) 0;
  background: var(--color-bg);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-lg);
  text-align: left;
  color: var(--color-text-secondary);
  font-size: 13px;
}

.footer-identity {
  display: grid;
  gap: 2px;
}

.footer-identity strong {
  color: var(--color-text);
}

.footer-identity span {
  color: var(--color-text-secondary);
}

.footer-links {
  display: flex;
  gap: var(--spacing-md);
}

.footer-links a {
  color: var(--color-text-muted);
}

.footer-links a:hover {
  color: var(--color-text);
}

/* Mermaid Diagrams */
.mermaid {
  text-align: center;
  margin: var(--spacing-lg) 0;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 36px;
  }

  .hero p {
    font-size: 16px;
  }

  .nav-links {
    max-width: calc(100vw - 100px);
    gap: 14px;
    overflow-x: auto;
  }

  .nav-links a {
    font-size: 12px;
  }

  .features {
    grid-template-columns: 1fr;
  }

  .pillar-grid,
  .architecture-section,
  .skills-section,
  .open-source-section {
    grid-template-columns: 1fr;
  }

  .architecture-section,
  .skills-section {
    gap: var(--spacing-lg);
  }

  .use-case-list article {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .project-facts {
    white-space: normal;
  }

  .workflow-signature {
    flex-wrap: wrap;
  }

  .evidence-links {
    grid-template-columns: 1fr;
  }

  .evidence-links > span {
    grid-column: 1;
  }

  .footer-container {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-links {
    flex-wrap: wrap;
  }

  .hero-cta {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    text-align: center;
  }
}