/* ============================================
   Trinity PKI — Global Stylesheet
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ---------- Design Tokens ---------- */
:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.7);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --border-glass: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);

  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --accent: #06b6d4;
  --accent-glow: rgba(6, 182, 212, 0.15);
  --accent-hover: #22d3ee;
  --accent-secondary: #8b5cf6;
  --accent-secondary-glow: rgba(139, 92, 246, 0.15);
  --accent-green: #10b981;
  --accent-orange: #f59e0b;
  --accent-red: #ef4444;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent-hover);
}

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

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

.container--narrow {
  max-width: 860px;
}

/* ---------- Navigation ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  background: rgba(10, 14, 26, 0.75);
  border-bottom: 1px solid var(--border-glass);
  transition: background var(--transition);
}

.nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text-primary);
}

.nav-brand .logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

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

.nav-links .btn-sm {
  padding: 8px 20px;
  background: var(--accent);
  color: var(--bg-primary);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.85rem;
  transition: all var(--transition);
}

.nav-links .btn-sm:hover {
  background: var(--accent-hover);
  color: var(--bg-primary);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px var(--accent-glow);
}

/* Mobile Nav */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

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

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 30% 20%, var(--accent-glow) 0%, transparent 50%),
              radial-gradient(ellipse at 70% 80%, var(--accent-secondary-glow) 0%, transparent 50%);
  animation: heroGlow 15s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes heroGlow {
  0% { transform: translate(0, 0) rotate(0deg); }
  100% { transform: translate(-30px, 20px) rotate(3deg); }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 28px;
  backdrop-filter: blur(10px);
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  background: var(--accent-green);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--accent), var(--accent-secondary), var(--accent));
  background-size: 200% auto;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 4s linear infinite;
}

@keyframes shimmer {
  0% { background-position: 0% center; }
  100% { background-position: 200% center; }
}

.hero p {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 40px;
  line-height: 1.8;
}

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

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #0891b2);
  color: var(--bg-primary);
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(6, 182, 212, 0.3);
  color: var(--bg-primary);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-hover);
  transform: translateY(-2px);
  color: var(--text-primary);
}

/* ---------- Sections ---------- */
section {
  padding: 100px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header .label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 16px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.section-header p {
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
  font-size: 1.05rem;
}

/* ---------- Feature Cards ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.feature-card {
  padding: 36px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.feature-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

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

.feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.feature-icon.cyan { background: var(--accent-glow); }
.feature-icon.purple { background: var(--accent-secondary-glow); }
.feature-icon.green { background: rgba(16, 185, 129, 0.15); }
.feature-icon.orange { background: rgba(245, 158, 11, 0.15); }

.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ---------- Architecture Section ---------- */
.arch-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.arch-card {
  padding: 28px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  transition: all var(--transition);
  text-align: center;
}

.arch-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.arch-card .emoji {
  font-size: 2rem;
  margin-bottom: 12px;
  display: block;
}

.arch-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.arch-card .tech-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 10px;
  background: var(--accent-glow);
  color: var(--accent);
  border-radius: 100px;
  margin-bottom: 10px;
}

.arch-card p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  line-height: 1.6;
}

/* ---------- Protocol Section ---------- */
.protocol-timeline {
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 720px;
  margin: 0 auto;
}

.protocol-step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

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

.protocol-step .step-num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.9rem;
}

.step-num.s1 { background: var(--accent-glow); color: var(--accent); }
.step-num.s2 { background: var(--accent-secondary-glow); color: var(--accent-secondary); }
.step-num.s3 { background: rgba(16, 185, 129, 0.15); color: var(--accent-green); }

.protocol-step h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.protocol-step p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.protocol-step code {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 2px 8px;
  background: rgba(6, 182, 212, 0.1);
  color: var(--accent);
  border-radius: 4px;
}

/* ---------- Code Blocks ---------- */
.code-block {
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: 32px auto;
  max-width: 700px;
}

.code-block .code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--border-glass);
}

.code-block .code-header span {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
}

.code-block .code-dots {
  display: flex;
  gap: 6px;
}

.code-block .code-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
}

.code-block pre {
  padding: 20px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.code-block pre .cmd { color: var(--accent-green); }
.code-block pre .comment { color: var(--text-muted); }
.code-block pre .flag { color: var(--accent-secondary); }
.code-block pre .string { color: var(--accent-orange); }

/* ---------- CTA Section ---------- */
.cta-section {
  text-align: center;
  padding: 80px 0 120px;
}

.cta-section h2 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-section p {
  color: var(--text-secondary);
  margin-bottom: 36px;
  font-size: 1.05rem;
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border-glass);
  padding: 48px 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer-copy {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  color: var(--text-muted);
  font-size: 0.85rem;
  transition: color var(--transition);
}

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

/* ---------- Docs Layout ---------- */
.docs-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  padding-top: 100px;
  min-height: 100vh;
}

.docs-sidebar {
  position: sticky;
  top: 100px;
  height: fit-content;
}

.docs-sidebar h3 {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.docs-sidebar ul {
  list-style: none;
  margin-bottom: 28px;
}

.docs-sidebar li a {
  display: block;
  padding: 6px 12px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  transition: all var(--transition);
}

.docs-sidebar li a:hover,
.docs-sidebar li a.active {
  color: var(--accent);
  border-left-color: var(--accent);
  background: var(--accent-glow);
}

.docs-content {
  max-width: 720px;
  padding-bottom: 100px;
}

.docs-content h1 {
  font-size: 2.2rem;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.docs-content .docs-subtitle {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-bottom: 40px;
  line-height: 1.7;
}

.docs-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 48px 0 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border-glass);
  letter-spacing: -0.01em;
}

.docs-content h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 32px 0 12px;
  color: var(--text-primary);
}

.docs-content p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.8;
}

.docs-content ul,
.docs-content ol {
  color: var(--text-secondary);
  margin: 0 0 20px 24px;
  line-height: 1.8;
}

.docs-content li {
  margin-bottom: 6px;
}

.docs-content code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  padding: 2px 8px;
  background: rgba(6, 182, 212, 0.08);
  color: var(--accent);
  border-radius: 4px;
}

.docs-content pre {
  background: var(--bg-secondary);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 20px;
  overflow-x: auto;
  margin-bottom: 24px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.docs-content pre code {
  background: none;
  padding: 0;
  color: inherit;
}

.docs-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 24px;
  font-size: 0.9rem;
}

.docs-content th {
  text-align: left;
  padding: 10px 16px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  font-weight: 600;
  color: var(--text-primary);
}

.docs-content td {
  padding: 10px 16px;
  border: 1px solid var(--border-glass);
  color: var(--text-secondary);
}

/* Docs Callout */
.callout {
  padding: 16px 20px;
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  font-size: 0.92rem;
  line-height: 1.7;
}

.callout.info {
  background: rgba(6, 182, 212, 0.06);
  border-left: 3px solid var(--accent);
  color: var(--text-secondary);
}

.callout.warning {
  background: rgba(245, 158, 11, 0.06);
  border-left: 3px solid var(--accent-orange);
  color: var(--text-secondary);
}

.callout.danger {
  background: rgba(239, 68, 68, 0.06);
  border-left: 3px solid var(--accent-red);
  color: var(--text-secondary);
}

.callout strong {
  color: var(--text-primary);
}

/* ---------- Coming Soon ---------- */
.coming-soon {
  position: relative;
  overflow: hidden;
}

.coming-soon::after {
  content: 'COMING SOON';
  position: absolute;
  top: 16px;
  right: -32px;
  background: linear-gradient(135deg, var(--accent-orange), #d97706);
  color: var(--bg-primary);
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  padding: 4px 40px;
  transform: rotate(35deg);
  z-index: 2;
  box-shadow: 0 2px 12px rgba(245, 158, 11, 0.3);
}

.coming-soon-banner {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 20px;
  background: rgba(245, 158, 11, 0.08);
  border: 1px solid rgba(245, 158, 11, 0.2);
  border-radius: var(--radius-md);
  margin-bottom: 32px;
  font-size: 0.92rem;
  color: var(--accent-orange);
  font-weight: 600;
}

.coming-soon-banner span {
  color: var(--text-secondary);
  font-weight: 400;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: block; }

  .hero { padding: 100px 20px 60px; }
  .hero p { font-size: 1rem; }
  .hero-actions { flex-direction: column; align-items: center; }

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

  .docs-layout {
    grid-template-columns: 1fr;
    padding-top: 80px;
  }
  .docs-sidebar {
    position: static;
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: 24px;
    margin-bottom: 24px;
  }
}

@media (max-width: 480px) {
  .arch-grid { grid-template-columns: 1fr; }
  .protocol-step { flex-direction: column; }
}