/* ptai-website/css/main.css */

:root {
  /* Colors — Dark Theme (Hero) */
  --hero-bg: #0a0a0f;
  --hero-surface: #12121a;
  --hero-border: #1e1e2e;
  --hero-text: #f0f0f5;
  --hero-muted: #8888aa;
  --accent-cyan: #00d4ff;
  --accent-gold: #ffc107;
  --accent-green: #00c853;

  /* Colors — Light Theme (Body) */
  --body-bg: #ffffff;
  --body-surface: #f8f9fc;
  --body-border: #e2e8f0;
  --body-text: #1a1a2e;
  --body-muted: #64748b;

  /* Typography */
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 40px;
  --space-2xl: 64px;

  /* Nav */
  --nav-height: 64px;
  --container-max: 1200px;
}

/* Body state: light by default */
body {
  font-family: var(--font-sans);
  background: var(--body-bg);
  color: var(--body-text);
  margin: 0;
}

/* Dark section override */
.dark-section {
  background: var(--hero-bg);
  color: var(--hero-text);
}

/* Container */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* Typography scale */
h1 { font-size: 3rem; font-weight: 700; letter-spacing: -0.02em; }
h2 { font-size: 2rem; font-weight: 600; letter-spacing: -0.01em; }
h3 { font-size: 1.25rem; font-weight: 600; }
p { line-height: 1.7; }

/* Tagline */
.tagline {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--hero-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: var(--hero-bg);
  border-bottom: 1px solid var(--hero-border);
  z-index: 1000;
  display: flex;
  align-items: center;
}

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

.nav-logo {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--hero-text);
  text-decoration: none;
  letter-spacing: 0.05em;
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--accent-cyan);
  text-decoration: none;
  letter-spacing: 0.12em;
  border: 1px solid var(--accent-cyan);
  padding: 4px 10px;
  border-radius: 4px;
}

.team-logo {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent-cyan);
  text-decoration: none;
  letter-spacing: 0.14em;
  border: 2px solid var(--accent-cyan);
  padding: 16px 28px;
  border-radius: 8px;
  margin: 0 auto;
  background: var(--hero-surface);
}

.nav-links {
  display: flex;
  gap: var(--space-xl);
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-dropdown {
  position: relative;
}

.nav-dropdown-trigger {
  color: var(--hero-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.95rem;
  transition: color 0.2s;
}

.nav-dropdown-trigger:hover { color: var(--hero-text); }

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--hero-surface);
  border: 1px solid var(--hero-border);
  border-radius: 8px;
  padding: var(--space-md) 0;
  min-width: 220px;
  z-index: 1001;
}

.nav-dropdown:hover .nav-dropdown-menu { display: block; }

.nav-dropdown-item {
  display: block;
  padding: var(--space-sm) var(--space-lg);
  color: var(--hero-muted);
  text-decoration: none;
  font-size: 0.9rem;
  transition: all 0.2s;
}

.nav-dropdown-item:hover {
  color: var(--hero-text);
  background: var(--hero-border);
}

.nav-dropdown-item span {
  display: block;
  font-size: 0.75rem;
  color: var(--hero-muted);
  margin-top: 2px;
}

/* Mobile nav */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  cursor: pointer;
  padding: var(--space-sm);
}

.nav-hamburger span {
  width: 24px;
  height: 2px;
  background: var(--hero-text);
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 12px 24px;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
  border: none;
}

.btn-primary {
  background: var(--accent-cyan);
  color: var(--hero-bg);
}

.btn-primary:hover {
  background: #00b8e6;
  transform: translateY(-1px);
}

.btn-secondary {
  background: transparent;
  color: var(--hero-text);
  border: 1px solid var(--hero-border);
}

.btn-secondary:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.btn-dark {
  background: var(--hero-surface);
  color: var(--hero-text);
  border: 1px solid var(--hero-border);
}

.btn-dark:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

/* Grids */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-lg); }
.grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: var(--space-lg); }
.grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: var(--space-lg); }

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* Cards */
.card {
  background: var(--hero-surface);
  border: 1px solid var(--hero-border);
  border-radius: 8px;
  padding: var(--space-lg);
}

.card-light {
  background: var(--body-surface);
  border: 1px solid var(--body-border);
  border-radius: 8px;
  padding: var(--space-lg);
}

/* Progress bar */
.progress-bar {
  height: 8px;
  background: var(--hero-border);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--accent-cyan);
  border-radius: 4px;
  transition: width 0.3s;
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--font-mono);
}

.badge-green {
  background: rgba(0, 200, 83, 0.15);
  color: var(--accent-green);
  border: 1px solid rgba(0, 200, 83, 0.3);
}

.badge-cyan {
  background: rgba(0, 212, 255, 0.15);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 212, 255, 0.3);
}

/* Footer */
.footer {
  background: var(--hero-bg);
  border-top: 1px solid var(--hero-border);
  padding: var(--space-2xl) 0;
  color: var(--hero-muted);
  font-size: 0.9rem;
}

.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

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

@media (max-width: 768px) {
  .footer-inner { flex-direction: column; gap: var(--space-md); text-align: center; }
}

/* Compliance badges */
.compliance-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin: var(--space-xl) 0;
}

.compliance-badge {
  display: inline-flex;
  padding: 8px 16px;
  background: var(--body-surface);
  border: 1px solid var(--body-border);
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--body-muted);
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
}

.compliance-badge:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}