/* ══════════════════════════════════════
   KYBURN — Shared styles
   Used by every page via base.njk
   ══════════════════════════════════════ */

*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0 }

/* ── TOKENS ── */
:root {
  --cyan:     #00e5ff;
  --cyan-dim: rgba(0,229,255,0.15);
  --dark:     #080810;
  --dark2:    #0d0d1a;
  --text:     #dde2f0;
  --dim:      #787ea0;
  --body:     #9da3be;
  --border:   rgba(0,229,255,0.1);
}
html[data-theme="light"] {
  --cyan:     #007fa3;
  --cyan-dim: rgba(0,127,163,0.1);
  --dark:     #f7f6f2;
  --dark2:    #edecea;
  --text:     #0d0d1a;
  --dim:      #7a7a8c;
  --body:     #4a4a5c;
  --border:   rgba(13,13,26,0.1);
}

/* ── BASE ── */
html { scroll-behavior: smooth }
body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--dark);
  color: var(--text);
  overflow-x: hidden;
  min-height: 100vh;
}

/* ── GRID BACKGROUND ── */
body::before {
  content: '';
  position: fixed; inset: 0;
  pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 64px 64px;
}
html[data-theme="dark"] body::after {
  content: '';
  position: fixed; inset: 0;
  pointer-events: none; z-index: 1;
  background: repeating-linear-gradient(
    0deg, transparent, transparent 3px,
    rgba(0,0,0,0.04) 3px, rgba(0,0,0,0.04) 4px
  );
}

/* ── NAV ── */
nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 3rem; height: 56px;
  background: rgba(8,8,16,0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s;
}
html[data-theme="light"] nav { background: rgba(247,246,242,0.92); }

.nav-logo {
  font-family: 'Orbitron', monospace;
  font-weight: 900; font-size: 1.1rem;
  color: var(--cyan); letter-spacing: 0.2em;
  text-decoration: none;
}
.nav-back {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem; letter-spacing: 0.12em;
  color: var(--dim); text-decoration: none;
  text-transform: uppercase;
  transition: color 0.2s;
  display: flex; align-items: center; gap: 0.5rem;
}
.nav-back:hover { color: var(--cyan) }
.nav-back svg { transition: transform 0.2s }
.nav-back:hover svg { transform: translateX(-3px) }

.nav-right { display: flex; align-items: center; gap: 1rem; }

.theme-toggle {
  background: none; border: 1px solid var(--border);
  padding: 0.4rem; cursor: pointer; color: var(--dim);
  display: flex; align-items: center; justify-content: center;
  transition: border-color 0.2s, color 0.2s;
  flex-shrink: 0; line-height: 0;
}
.theme-toggle:hover { border-color: var(--cyan); color: var(--cyan); }
.theme-toggle .icon-sun  { display: block }
.theme-toggle .icon-moon { display: none }
html[data-theme="light"] .theme-toggle .icon-sun  { display: none }
html[data-theme="light"] .theme-toggle .icon-moon { display: block }

/* ── BUTTONS ── */
.btn-primary {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase;
  padding: 0.85rem 2rem;
  background: var(--cyan); color: #000;
  text-decoration: none;
  transition: opacity 0.2s, transform 0.2s, box-shadow 0.2s;
}
.btn-primary:hover {
  opacity: 0.85;
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(0,229,255,0.3);
}

/* ── ANIMATIONS ── */
@keyframes ring-spin { to { filter: hue-rotate(360deg) } }
@keyframes pulse-dot { 0%,100%{opacity:1} 50%{opacity:0.4} }

/* ── RESPONSIVE (shared) ── */
@media (max-width: 768px) {
  nav { padding: 0 1.5rem; }
}