:root{--bg:#f6f7fb;--card:#fff;--muted:#6b7280;--accent:#0b5fff}*{box-sizing:border-box}body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial;background:var(--bg);color:#111}.header{display:flex;justify-content:space-between;align-items:center;padding:12px 20px;background:transparent;border-bottom:1px solid rgba(0,0,0,.06)}.site-title{font-weight:600}.container{padding:24px;max-width:1200px;margin:0 auto}.button{background:var(--accent);color:#fff;padding:8px 12px;border-radius:8px;border:none;cursor:pointer}.user-info{display:flex;gap:8px;align-items:center}.app-grid{display:grid;grid-template-columns:1fr 480px;gap:12px;padding:12px}.editor{background:var(--card);padding:12px;border-radius:8px}.preview{background:#fff;border-radius:8px;border:1px solid #eee;padding:8px;height:640px}.code-area{height:300px}.modal-backdrop{position:fixed;inset:0;background:#0b0f1e73;display:flex;align-items:center;justify-content:center;z-index:50}.modal{background:var(--card);border-radius:12px;padding:18px;width:520px;box-shadow:0 10px 30px #02061714}.modal h3{margin:0 0 8px}.modal-tabs{display:flex;gap:8px;margin-top:8px}.modal-tab{padding:8px 10px;border-radius:8px;border:1px solid #eee;background:#fafafa;cursor:pointer}.modal-tab.active{background:#fff;box-shadow:0 2px 8px #0000000f}.modal-body{margin-top:12px}.modal-footer{margin-top:12px;display:flex;justify-content:flex-end;gap:8px}textarea,input{width:100%;box-sizing:border-box;padding:8px;border:1px solid #ddd;border-radius:6px}.login-buttons{display:flex;flex-direction:column;gap:10px;margin-top:12px}.btn-social{display:flex;align-items:center;gap:10px;padding:10px;border-radius:10px;border:1px solid rgba(0,0,0,.06);background:transparent;cursor:pointer}.icon{width:20px;height:20px;display:inline-block;border-radius:4px;background:linear-gradient(180deg,#fff,#eee)}.small-muted{color:var(--muted);font-size:13px;margin-top:8px}