:root{--bg: #0f1115;--card: #171a21;--border: #262b36;--text: #e7eaf0;--muted: #9aa3b2;--primary: #4f7cff;--primary-hover: #3f68e0;--danger: #ff6b6b;color-scheme:dark}*{box-sizing:border-box}html,body{margin:0;padding:0;height:100%}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;display:flex;align-items:center;justify-content:center;padding:24px}#root{width:100%;max-width:460px}.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:32px;display:flex;flex-direction:column;gap:20px}h1{margin:0;font-size:24px;font-weight:700}.row{display:flex;align-items:center;justify-content:space-between;gap:12px}.muted{color:var(--muted);margin:0}.notice{margin:0;padding:12px 14px;border-radius:10px;background:#ffffff0a;border:1px solid var(--border);color:var(--text)}.notice.error{color:var(--danger);border-color:#ff6b6b66}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 16px;border-radius:10px;border:1px solid var(--border);background:transparent;color:var(--text);font-size:15px;font-weight:600;text-decoration:none;cursor:pointer;transition:background .15s ease,border-color .15s ease}.btn:hover{background:#ffffff0d}.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}.btn.primary:hover{background:var(--primary-hover);border-color:var(--primary-hover)}.btn.ghost{border:none;color:var(--muted);padding:6px 10px;font-weight:500}.toggle{display:inline-flex;align-items:center;gap:8px;color:var(--muted);font-size:14px;cursor:pointer;-webkit-user-select:none;user-select:none}.build{display:flex;flex-direction:column;gap:16px}.version{margin:0;font-size:16px}.downloads{display:flex;flex-wrap:wrap;gap:12px}