/* Low Gravitas — shared layout CSS
   Color variables come from low-gravitas-zen.css (linked separately). */

/* ── Reset ── */

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

/* ── Bridge variables ── */

:root {
  --glow: rgba(128, 64, 208, 0.4);
  --accent-hover: var(--lgz-bright-blue);
  --shadow-alpha: 0.4;
}
[data-theme="light"] {
  --glow: rgba(128, 64, 208, 0.3);
}

/* ── Body ── */

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--surface-raised);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main { flex: 1; }

/* ── Links ── */

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

/* ── Symbol font utility ── */

.lg { font-family: 'LowGravitasSymbols', monospace; }

/* ── Nav ── */

nav {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
}

nav .nav-left { font-size: 1rem; font-weight: 600; }

nav .nav-left .brand {
  font-family: 'LowGravitasSymbols', monospace;
  color: var(--accent);
  font-size: 2em;
  margin-right: 6px;
  vertical-align: -0.2em;
}

nav .nav-right { display: flex; gap: 16px; align-items: center; }

nav a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 14px;
  padding: 4px 2px;
  transition: color 0.15s;
}
nav a:hover { color: var(--link); }

nav a.nav-left { font-size: 1rem; color: var(--text); }
nav a.nav-left:hover { color: var(--accent); }

#theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  color: var(--text);
  transition: border-color 0.15s;
  font-family: 'LowGravitasSymbols', monospace;
  font-size: 16px;
  line-height: 1;
  padding: 8px 10px;
  min-width: 36px;
  min-height: 36px;
}
#theme-toggle:hover { border-color: var(--accent); }
#theme-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ── Buttons ── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s, box-shadow 0.2s;
  cursor: pointer;
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--surface);
}
.btn:hover {
  border-color: var(--accent);
  box-shadow: 0 0 14px var(--glow);
}
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.btn.primary {
  background: var(--accent);
  color: var(--text-on-accent);
  border-color: var(--accent);
}
.btn.primary:hover {
  box-shadow: 0 0 18px var(--glow);
}

/* ── Footer ── */

footer {
  border-top: 1px solid var(--border);
  padding: 16px 24px;
  text-align: center;
  color: var(--text-dim);
  font-size: 12px;
}
footer a { color: var(--text-dim); text-decoration: none; }
footer a:hover { color: var(--link); }

/* ── Accessibility ── */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--accent);
  color: var(--text-on-accent);
  padding: 8px 16px;
  z-index: 100;
  text-decoration: none;
  font-size: 14px;
  transition: top 0.15s;
}
.skip-link:focus { top: 0; }

/* ── Animations ── */

.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .fade-in { opacity: 1; transform: none; transition: none; }
  .btn { transition: none; }
  .skip-link { transition: none; }
  nav a { transition: none; }
  #theme-toggle { transition: none; }
}

/* ── Selection ── */

::selection {
  background: var(--selection-bg);
  color: var(--selection-fg);
}

/* ── Responsive nav ── */

@media (max-width: 640px) {
  nav {
    flex-wrap: wrap;
    gap: 8px;
  }
  nav a {
    padding: 8px 4px;
  }
}