/* Light mode overrides */
[data-theme="light"] {
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-surface-hover: #f1f5f9;
  --color-text: #1e293b;
  --color-text-muted: #64748b;
  --color-border: #e2e8f0;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
}
[data-theme="light"] nav { background: rgba(255,255,255,0.9); border-bottom: 1px solid var(--color-border); }
[data-theme="light"] .hero, [data-theme="light"] .section { background: var(--color-bg); }
[data-theme="light"] .card, [data-theme="light"] .post, [data-theme="light"] .forum-post { background: var(--color-surface); border: 1px solid var(--color-border); }
[data-theme="light"] footer { background: #f1f5f9; color: var(--color-text-muted); }
[data-theme="light"] input, [data-theme="light"] textarea, [data-theme="light"] select { background: #fff; color: var(--color-text); border-color: var(--color-border); }
[data-theme="light"] .theme-toggle { color: var(--color-text); border-color: var(--color-border); }