/* ---- Font ---- */
@font-face {
  font-family: "SymbolLang";
  src: url("../fonts/SymbolLang.ttf") format("truetype-variations");
  font-weight: 100 900;
}

/* ---- Theme: Dark (default) ---- */
:root {
  --color-bg: #0b0b0d;
  --color-panel: #111116;
  --color-ink: #f3f3f3;
  --color-dim: #8a8a90;
  --color-dimmer: #555;
  --color-border: #26262b;
  --color-accent: #5eead4;
  --color-accent2: #f0a978;
  --color-glyph: #c8cdd8;
}

/* ---- Theme: Light ---- */
[data-theme="light"] {
  --color-bg: #f5f5f7;
  --color-panel: #ffffff;
  --color-ink: #1a1a1a;
  --color-dim: #6b6b70;
  --color-dimmer: #999;
  --color-border: #d8d8dc;
  --color-accent: #0d9488;
  --color-accent2: #c77a3a;
  --color-glyph: #2a2a3a;
}

/* ---- Reset & base ---- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  font-family: ui-sans-serif, -apple-system, system-ui, sans-serif;
  background: var(--color-bg);
  color: var(--color-ink);
}

.sym {
  font-family: "SymbolLang";
  line-height: 1;
}

/* ---- Sticky nav ---- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.6rem 1.5rem;
  background: color-mix(in srgb, var(--color-bg) 80%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-left: 2rem;
}

.nav-github {
  display: flex;
  align-items: center;
  width: 1.4rem;
  height: 1.4rem;
  opacity: 0.5;
  transition: opacity 0.15s;
}

.nav-github:hover {
  opacity: 1;
}

.nav-github img {
  width: 100%;
  height: 100%;
}

/* swap icon per theme */
.nav-github .icon-light {
  display: none;
}

:root .nav-github .icon-dark {
  display: block;
}

[data-theme="light"] .nav-github .icon-dark {
  display: none;
}

[data-theme="light"] .nav-github .icon-light {
  display: block;
}

.site-nav a {
  color: var(--color-dim);
  text-decoration: none;
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  transition: color 0.15s;
}

.site-nav a:hover {
  color: var(--color-ink);
}

.site-nav a.active {
  color: var(--color-accent);
  font-weight: 600;
}

.site-nav a.nav-brand {
  color: var(--color-ink);
  font-weight: 600;
  font-size: 0.82rem;
  margin-right: 0.5rem;
}

.nav-download {
  background: var(--color-accent);
  color: #0b0b0d !important;
  font-weight: 600 !important;
  font-size: 0.72rem !important;
  padding: 0.35rem 0.8rem;
  border-radius: 6px;
  text-decoration: none;
  letter-spacing: 0.03em;
  transition: opacity 0.15s;
  opacity: 0.9;
}

.nav-download:hover {
  opacity: 1;
}

#theme-toggle {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-dim);
  font-size: 1rem;
  width: 2rem;
  height: 2rem;
  border-radius: 6px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s, color 0.15s;
}

#theme-toggle:hover {
  border-color: var(--color-accent);
  color: var(--color-ink);
}