:root,[data-theme=light]{--bg:#fff;--text:#1f2937;--theme:#ffd7e0}[data-theme=dark]{--bg:#0b1220;--text:#e5e7eb;--theme:#111827}[data-theme=turq]{--bg:#fff;--text:#0f172a;--theme:#2dd4bf}html{background:var(--bg);color:var(--text)}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif}main{max-width:720px;padding:16px 16px calc(16px + env(safe-area-inset-bottom));margin:0 auto}button{cursor:pointer;background:#fff;border:1px solid #cbd5e1;border-radius:12px;padding:8px 12px}#adbar{z-index:10;background:#fff;border-top:1px solid #e5e7eb;position:sticky;bottom:0;left:0;right:0}#adbar .ad-slot{justify-content:center;align-items:center;min-height:64px;padding:8px;display:flex}main{padding-bottom:calc(16px + env(safe-area-inset-bottom) + 64px)}.btn-theme{background:var(--theme);border-color:#0000}.topnav{background:var(--bg);z-index:5;border-bottom:1px solid #e5e7eb;gap:8px;padding:8px 12px;display:flex;position:sticky;top:0}.topnav-link{color:var(--text);border-radius:8px;padding:6px 8px;text-decoration:none}.topnav a[aria-current=page]{border-bottom:2px solid var(--theme);font-weight:600}.cta{border-radius:12px;padding:8px 12px;text-decoration:none;display:inline-block}