:root{color-scheme:light;--latar: #ffffff;--lembut: #f5f5f7;--teks: #1d1d1f;--redup: #6e6e73;--garis: rgba(0, 0, 0, .09);--biru: #0a84ff;--hijau: #34c759;--merah: #ff3b30;--radius: 16px}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--latar)}body{color:var(--teks);font-family:DM Sans,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;font-size:14px;line-height:1.45;-webkit-font-smoothing:antialiased}h1,h2{font-family:Space Grotesk,DM Sans,sans-serif;letter-spacing:-.015em;margin:0}.angka{font-family:JetBrains Mono,ui-monospace,SFMono-Regular,Menlo,monospace;font-variant-numeric:tabular-nums}.halaman{max-width:520px;margin:0 auto;padding:0 16px 40px}.kepala{position:sticky;top:0;z-index:10;display:flex;align-items:center;gap:10px;padding:12px 0 10px;margin-bottom:12px;background:#ffffffe6;-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--garis)}.kartu{background:#fff;border:1px solid var(--garis);border-radius:var(--radius);box-shadow:0 1px 3px #0000000d;padding:16px;margin-bottom:12px}@keyframes masuk{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}.masuk{animation:masuk .22s ease-out}@media(prefers-reduced-motion:reduce){.masuk{animation:none}}.tombol{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:40px;padding:0 16px;border-radius:999px;border:1px solid var(--garis);background:#fff;color:var(--teks);font:inherit;font-weight:500;cursor:pointer}.tombol:hover:not(:disabled){background:var(--lembut)}.tombol-utama{border-color:transparent;background:var(--biru);color:#fff;box-shadow:0 8px 18px -10px #0a84ffa6}.tombol-utama:hover:not(:disabled){background:#0070e0}.tombol:disabled{opacity:.4;cursor:default}.tombol-teks{border:none;background:transparent;color:var(--redup);font:inherit;font-weight:500;cursor:pointer;padding:8px 10px}.kotak{width:100%;height:46px;padding:0 12px;border-radius:12px;border:1px solid rgba(0,0,0,.14);background:#fff;color:var(--teks);font:inherit;font-family:JetBrains Mono,ui-monospace,monospace;font-size:16px;font-variant-numeric:tabular-nums}.kotak::placeholder{font-family:DM Sans,sans-serif;font-size:13.5px;color:#a1a1a6}.kotak:focus{outline:none;border-color:var(--biru);box-shadow:0 0 0 3px #0a84ff38}.kotak.terisi{border-color:var(--hijau);box-shadow:0 0 0 3px #34c7592e}.label{font-size:11.5px;font-weight:700;letter-spacing:.04em;text-transform:uppercase;color:var(--redup);display:block;margin-bottom:4px}.redup{color:var(--redup)}.pesan{position:fixed;left:50%;bottom:20px;transform:translate(-50%);z-index:50;max-width:min(92vw,460px);padding:12px 18px;border-radius:14px;background:#1d1d1f;color:#fff;font-size:13.5px;box-shadow:0 14px 34px -14px #0000008c}.pesan.gagal{background:var(--merah)}