/* app/static/styles.css -- Shared design system */

/* ---- Fonts ---- */
@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;0,9..40,800&family=Space+Mono:wght@700&display=swap');

/* ---- Color Palette ---- */
:root {
  /* Backgrounds */
  --bg-base:        #f5f7fa;
  --bg-surface:     #ffffff;
  --bg-card:        #ffffff;
  --bg-input:       #f0f2f5;
  --bg-hover:       #eef1f6;

  /* Borders */
  --border:         #dde1e8;
  --border-subtle:  #e8ebf0;

  /* Text */
  --text-primary:   #1a2332;
  --text-secondary: #4a5568;
  --text-muted:     #8896a6;

  /* Accent (blue) */
  --accent:         #3b82f6;
  --accent-hover:   #2563eb;
  --accent-light:   #60a5fa;
  --accent-text:    #ffffff;
  --accent-glow:    rgba(59, 130, 246, 0.15);

  /* Semantic */
  --success:        #10b981;
  --success-bg:     #059669;
  --danger:         #dc2626;
  --danger-hover:   #ef4444;
  --danger-text:    #dc2626;
  --warning:        #f59e0b;

  /* Motion */
  --ease-out:       cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring:    cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ---- Base Reset ---- */
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
}

/* ---- Scroll Reveal System ---- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.94); }
  to { opacity: 1; transform: scale(1); }
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s var(--ease-out), transform 0.65s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children inside a reveal container */
.stagger > *:nth-child(1) { transition-delay: 0ms; }
.stagger > *:nth-child(2) { transition-delay: 70ms; }
.stagger > *:nth-child(3) { transition-delay: 140ms; }
.stagger > *:nth-child(4) { transition-delay: 210ms; }
.stagger > *:nth-child(5) { transition-delay: 280ms; }
.stagger > *:nth-child(6) { transition-delay: 350ms; }
.stagger > *:nth-child(7) { transition-delay: 420ms; }
.stagger > *:nth-child(8) { transition-delay: 490ms; }
.stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.55s var(--ease-out), transform 0.55s var(--ease-out);
}
.stagger.visible > * {
  opacity: 1;
  transform: translateY(0);
}

/* Page load animation */
.page-enter { animation: fadeUp 0.6s var(--ease-out) 0.05s both; }

/* ---- Monospace Labels ---- */
.mono-label {
  font-family: 'Space Mono', monospace;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  color: var(--accent);
  font-weight: 700;
}

/* ---- Shared Card Hover ---- */
.card-lift {
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s, border-color 0.3s;
}
.card-lift:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 36px rgba(15, 23, 42, 0.07);
}

/* ---- Blue Top Border Reveal ---- */
.border-reveal {
  position: relative;
  overflow: hidden;
}
.border-reveal::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease-out);
}
.border-reveal:hover::after {
  transform: scaleX(1);
}

/* ---- Buttons ---- */
.btn-hover-lift {
  transition: all 0.25s var(--ease-out);
}
.btn-hover-lift:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--accent-glow);
}
.btn-hover-lift:active {
  transform: translateY(0);
}

/* ---- Site Navigation ---- */
.site-nav {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  padding: 0 40px;
  position: sticky;
  top: 0;
  z-index: 50;
  animation: fadeIn 0.4s ease both;
}
.nav-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.nav-logo { display: flex; align-items: center; text-decoration: none; }
.nav-logo-img { height: 36px; width: auto; }
.nav-links { display: flex; gap: 4px; }
.nav-link {
  padding: 8px 16px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
}
.nav-link:hover { color: var(--text-primary); background: var(--bg-hover); }
.nav-link.active { color: var(--accent); font-weight: 600; }
@media (max-width: 600px) {
  .site-nav { padding: 0 16px; }
  .nav-link { padding: 8px 10px; font-size: 0.82rem; }
}

/* ---- Site Footer ---- */
.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  padding: 32px 40px;
  margin-top: 48px;
}
.footer-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-links { display: flex; gap: 20px; }
.footer-link {
  font-size: 0.82rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-link:hover { color: var(--accent); }
.footer-copy {
  font-size: 0.78rem;
  color: var(--text-muted);
}
@media (max-width: 600px) {
  .site-footer { padding: 24px 16px; }
  .footer-inner { flex-direction: column; align-items: flex-start; }
}

/* ---- Subtle Grain Overlay ---- */
body::after {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  opacity: 0.02;
  z-index: 9999;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---- Scroll Reveal Observer (shared script) ---- */
/* Add this script tag to any page that uses .reveal:
   <script>
     const obs = new IntersectionObserver(es => es.forEach(e => { if (e.isIntersecting) e.target.classList.add('visible'); }), { threshold: 0.1, rootMargin: '0px 0px -30px 0px' });
     document.querySelectorAll('.reveal').forEach(el => obs.observe(el));
   </script>
*/