:root{--bg:#14171c;--surface:#1e232b;--surface2:#262c36;--line:#333b47;--text:#f4f1ea;--text-dim:#8b93a1;--brand:#f5b841;--up:#ff6b5d;--down:#6bcb77;--radius:16px}*{box-sizing:border-box}body,html{margin:0;padding:0;background:#0a0c0f;color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Inter,Segoe UI,sans-serif}.num{font-feature-settings:"tnum";font-variant-numeric:tabular-nums;font-weight:600}a{color:inherit}button{font-family:inherit;cursor:pointer}.container{max-width:460px;margin:0 auto;min-height:100vh;background:var(--bg);padding-bottom:40px}.btn{display:block;width:100%;padding:16px;border-radius:12px;border:none;font-weight:600;font-size:15px;text-align:center;transition:transform .12s ease,opacity .12s ease}.btn:active{transform:scale(.97)}.btn-primary{background:var(--brand);color:#14171c}.btn-ghost{background:var(--surface2);color:var(--text)}.btn:disabled{opacity:.5;cursor:not-allowed}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px}