/* =================================================================
   DARK THEME
   ================================================================= */

:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --border: #2e3250;
  --accent: #4f7fff;
  --accent2: #7c5cfc;
  --text: #e8eaf6;
  --muted: #7b82a8;
  --radius: 14px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

/* ---- Theme switcher ---- */
.theme-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted);
  transition: border-color 0.15s, color 0.15s;
}
.theme-btn:hover, .theme-btn.active { border-color: var(--accent); color: var(--accent); }
.theme-folder .folder-icon { display: none; }

/* ---- Header ---- */
header h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, #a8c0ff, #7c5cfc);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
header p { color: var(--muted); margin-top: 0.5rem; font-size: 0.95rem; }

/* ---- Card ---- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.15s, border-color 0.15s, box-shadow 0.15s;
}
.card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--c1, #4f7fff22), var(--c2, #7c5cfc11));
  opacity: 0;
  transition: opacity 0.15s;
  pointer-events: none;
}
.card:hover { transform: translateY(-3px); border-color: var(--c1, var(--accent)); box-shadow: 0 8px 28px rgba(0,0,0,0.35); }
.card:hover::after { opacity: 1; }

.card-desc { color: var(--muted); }
.card-tag { color: var(--c1, var(--accent)); }

footer { color: var(--muted); }