/* ═══════════════════════════════════════════════════════════════════════════
   Pratyaxa — Shared Design System
   CSS variables, nav, footer, noise overlay, scroll reveal, hamburger, responsive
   ═══════════════════════════════════════════════════════════════════════════ */

:root {
  --bg: #0a0a0b;
  --surface: #111113;
  --border: #1e1e22;
  --border-light: #2a2a30;
  --text: #e2e2e6;
  --muted: #6b6b7a;
  --accent: #c8f060;
  --accent-dim: #8faa3a;
  --red: #ff4d4d;
  --mono: 'DM Mono', monospace;
  --serif: 'Fraunces', serif;
  --sans: 'Karla', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-weight: 300;
  line-height: 1.6;
  overflow-x: hidden;
}

/* Noise overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  opacity: 0.4;
}

/* ── NAV ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 4rem;
  border-bottom: 1px solid var(--border);
  background: rgba(10,10,11,0.85);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.nav-logo {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: color 0.2s;
}

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

.nav-badge {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ── HAMBURGER ── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 22px;
  height: 15px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 101;
  flex-shrink: 0;
}

.nav-hamburger span {
  display: block;
  width: 100%;
  height: 1px;
  background: var(--muted);
  transition: transform 0.3s ease, opacity 0.3s ease, background 0.2s;
}

.nav-hamburger:hover span { background: var(--text); }
nav.nav-open .nav-hamburger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
nav.nav-open .nav-hamburger span:nth-child(2) { opacity: 0; transform: scaleX(0); }
nav.nav-open .nav-hamburger span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

/* ── SCROLL REVEAL ── */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ── FOOTER ── */
footer {
  padding: 2rem 4rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border);
}

footer span {
  font-family: var(--mono);
  font-size: 0.65rem;
  color: var(--muted);
  letter-spacing: 0.06em;
}

.footer-admin {
  font-family: var(--mono);
  font-size: 0.6rem;
  color: var(--border-light);
  text-decoration: none;
  letter-spacing: 0.06em;
  transition: color 0.2s;
}

.footer-admin:hover { color: var(--muted); }

/* ── RESPONSIVE (shared breakpoints) ── */
@media (max-width: 1024px) {
  nav { padding: 1.25rem 2.5rem; }
  footer { padding: 2rem 2.5rem; }
}

@media (max-width: 900px) {
  nav { padding: 1rem 1.5rem; }
  .nav-links { gap: 1.25rem; }
  footer { padding: 1.5rem 2rem; flex-direction: column; gap: 0.5rem; }
}

@media (max-width: 768px) {
  .nav-links a { font-size: 0.65rem; letter-spacing: 0.03em; }
}

@media (max-width: 600px) {
  .nav-hamburger { display: flex; }
  .nav-links {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(10,10,11,0.97);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 2.5rem;
    z-index: 100;
    list-style: none;
  }
  nav.nav-open .nav-links { display: flex; }
  .nav-links a { font-size: 1.1rem; letter-spacing: 0.08em; color: var(--text); }
  footer { padding: 1.25rem; }
}

html[data-theme='light'] {
  --bg: #f7f8fb;
  --surface: #ffffff;
  --border: #e5e7eb;
  --border-light: #eef0f4;
  --text: #0a0a0b;
  --muted: #5b6270;
  --accent: #3f7a14;
  --accent-dim: #6aa832;
}

html[data-theme='light'] nav { background: rgba(255,255,255,0.85); }

.theme-toggle {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border);
  padding: 0.35rem 0.6rem;
  border-radius: 999px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
}

.theme-toggle:hover { color: var(--text); border-color: var(--border-light); }

.nav-links .theme-toggle { align-self: center; }

@media (max-width: 600px) {
  html[data-theme='light'] .nav-links { background: rgba(255,255,255,0.97); }
  .nav-links .theme-toggle { font-size: 1.1rem; letter-spacing: 0.08em; color: var(--text); }
}

html[data-theme='light'] .btn-primary { color: #ffffff; }