/* Gaya ala Threads: hitam, putih, satu kolom di tengah, tanpa hiasan. */
:root { --bg: #101010; --panel: #181818; --garis: #2a2a2a; --teks: #f3f5f7; --redup: #9aa0a6; --hijau: #9ee6b4; --merah: #e69e9e; }
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--teks); font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
a { color: inherit; }
header { display: flex; align-items: center; justify-content: space-between; max-width: 620px; margin: 0 auto; padding: 18px 20px; }
header .logo { font-weight: 800; font-size: 20px; letter-spacing: -0.02em; text-decoration: none; }
header nav a { color: var(--redup); text-decoration: none; margin-left: 16px; font-size: 14px; }
header nav a:hover { color: var(--teks); }
main { max-width: 620px; margin: 0 auto; padding: 8px 20px 80px; }
h1 { font-size: 30px; line-height: 1.2; letter-spacing: -0.02em; margin: 28px 0 10px; }
h2 { font-size: 17px; margin: 28px 0 10px; }
p { margin: 0 0 12px; }
.redup { color: var(--redup); }
.kartu { background: var(--panel); border: 1px solid var(--garis); border-radius: 16px; padding: 20px; margin: 14px 0; }
label { display: block; font-size: 13px; color: var(--redup); margin: 14px 0 6px; }
input { width: 100%; font: inherit; background: #101010; color: var(--teks); border: 1px solid #333; border-radius: 12px; padding: 12px 14px; outline: none; }
input:focus { border-color: #666; }
button, .tombol { display: inline-block; font: inherit; font-weight: 700; cursor: pointer; border: 1px solid var(--teks); background: var(--teks); color: #101010; border-radius: 12px; padding: 12px 18px; text-decoration: none; }
button:hover, .tombol:hover { background: #dfe3e6; }
button.polos, .tombol.polos { background: transparent; color: var(--teks); border-color: #333; font-weight: 500; }
button.polos:hover, .tombol.polos:hover { border-color: #666; }
button.lebar { width: 100%; margin-top: 18px; }
button:disabled { opacity: .5; cursor: default; }
.pesan { display: none; margin-top: 12px; padding: 10px 12px; border-radius: 10px; font-size: 14px; }
.pesan.gagal { display: block; background: #3a1616; color: var(--merah); }
.pesan.ok { display: block; background: #163a24; color: var(--hijau); }
.angka { font-size: 44px; font-weight: 800; letter-spacing: -0.03em; line-height: 1; }
.baris { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.baris .isi { flex: 1; min-width: 0; }
code.token { display: block; font: 13px/1.5 ui-monospace, Menlo, monospace; background: #101010; border: 1px solid #333; border-radius: 10px; padding: 10px 12px; word-break: break-all; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 6px; border-bottom: 1px solid var(--garis); vertical-align: top; }
th { color: var(--redup); font-weight: 500; font-size: 13px; }
td.n, th.n { text-align: right; white-space: nowrap; }
.plus { color: var(--hijau); } .minus { color: var(--redup); }
.langkah { counter-reset: n; padding: 0; margin: 0; list-style: none; }
.langkah li { display: flex; gap: 14px; padding: 14px 0; border-top: 1px solid var(--garis); }
.langkah li::before { counter-increment: n; content: counter(n); flex: 0 0 30px; height: 30px; border-radius: 50%; background: var(--teks); color: #101010; font-weight: 800; display: flex; align-items: center; justify-content: center; }
.langkah b { display: block; }
.langkah span { color: var(--redup); }
.pill { display: inline-block; font-size: 12px; border: 1px solid #333; border-radius: 999px; padding: 2px 9px; color: var(--redup); }
footer { max-width: 620px; margin: 0 auto; padding: 20px; color: var(--redup); font-size: 13px; border-top: 1px solid var(--garis); }
@media (max-width: 480px) { h1 { font-size: 26px; } .angka { font-size: 38px; } }