:root{--bg:#fff;--surface:#f5f7fa;--card:#fff;--border:#e2e8f0;--text:#1a202c;--muted:#718096;--accent:#5a8dee;--accent2:#7c5cff;--success:#38a169;--warning:#d69e2e;--danger:#e53e3e}*{box-sizing:border-box;margin:0;padding:0}body,html{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Inter,sans-serif;min-height:100vh;-webkit-font-smoothing:antialiased}a{color:var(--accent);text-decoration:none}button{font-family:inherit;cursor:pointer}input,select,textarea{font-family:inherit;background:var(--surface);color:var(--text);border:1px solid var(--border);border-radius:10px;padding:12px 14px;outline:none}input:focus,select:focus,textarea:focus{border-color:var(--accent)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;border-radius:10px;font-weight:600;border:1px solid transparent;background:var(--accent);color:#fff;transition:opacity .15s}.btn:hover{opacity:.9}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-ghost{background:transparent;border-color:var(--border);color:var(--text)}.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:20px}.container{max-width:1200px;margin:0 auto;padding:24px}@media (max-width:700px){.card{padding:14px;border-radius:12px}input,select,textarea{font-size:16px;padding:10px 12px}.btn{padding:10px 16px}}