:root {
  --bg: #ffffff;
  --text: #111111;
  --muted: #666666;
  --border: #e5e5e5;
}

[data-theme="dark"] {
  --bg: #0e0e0e;
  --text: #f5f5f5;
  --muted: #aaaaaa;
  --border: #222222;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: Inter, system-ui, sans-serif;
}

.theme-toggle{
  width:42px;
  height:42px;
  border-radius:12px;
  border:1px solid var(--border);
  background: rgba(0,0,0,.04);
  color: inherit;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  cursor:pointer;
  transition: transform .12s ease, border-color .12s ease, background .12s ease;
}

[data-theme="dark"] .theme-toggle{
  background: rgba(255,255,255,.04);
  border-color: rgba(255,255,255,.10);
}

.theme-toggle:hover{
  transform: translateY(-1px);
  border-color: rgba(124,243,208,.35);
  background: rgba(255,255,255,.06);
}

.theme-icon{
  font-size:18px;
  line-height:1;
}

.site-header{
  position: sticky;
  top: 0;
  z-index: 999;                 /* biar di atas konten */
  background: var(--bg);        /* biar ga transparan */
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);  /* optional: efek glass */
}