:root {
  --bg: #0f1320;
  --card: #1a2033;
  --line: #2c3450;
  --text: #eef1f8;
  --muted: #a3acc4;
  --flame: #ff7a28;
  --gold: #ffc440;
  --ok: #3ecf8e;
  --bad: #ff6b6b;
  --warn-bg: #3a2a12;
  --radius: 14px;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root { --bg: #f6f3ee; --card: #ffffff; --line: #e3ddd2; --text: #1b1f2c; --muted: #5f667a; --warn-bg: #fff3dc; color-scheme: light; }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  padding: 0 16px env(safe-area-inset-bottom);
}
main, .top, footer { max-width: 560px; margin: 0 auto; }

.top { display: flex; gap: 12px; align-items: center; padding: 20px 0 8px; }
.top img { border-radius: 9px; }
h1 { font-size: 1.35rem; margin: 0; letter-spacing: -0.01em; }
.tag { margin: 0; color: var(--muted); font-size: 0.92rem; }
h2 { font-size: 1.08rem; margin: 0 0 12px; display: flex; align-items: center; gap: 10px; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; margin: 14px 0; }
.step { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%;
  background: var(--flame); color: #111; font-size: 0.85rem; font-weight: 700; flex: none; }

label { display: block; font-weight: 600; font-size: 0.92rem; margin: 14px 0 6px; }
input[type="text"], input[type="url"], select, textarea {
  width: 100%; padding: 12px 14px; font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--line); border-radius: 10px;
}
input:focus-visible, select:focus-visible, textarea:focus-visible, button:focus-visible, a:focus-visible {
  outline: 3px solid var(--gold); outline-offset: 2px;
}
textarea { resize: none; word-break: break-all; font-family: ui-monospace, Consolas, monospace; font-size: 0.85rem; }

.choice { display: grid; gap: 10px; }
.choice label, .check { display: flex; gap: 12px; align-items: flex-start; font-weight: 400; margin: 0;
  padding: 12px 14px; border: 1px solid var(--line); border-radius: 12px; cursor: pointer; }
.check { margin-top: 16px; }
.choice label:has(input:checked) { border-color: var(--flame); background: color-mix(in srgb, var(--flame) 10%, transparent); }
.choice input, .check input { margin-top: 4px; accent-color: var(--flame); width: 18px; height: 18px; flex: none; }
small, .small { color: var(--muted); font-size: 0.85rem; }
.hint { display: block; margin-top: 6px; }
.badge { font-style: normal; font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.04em;
  color: #111; background: var(--ok); padding: 1px 7px; border-radius: 99px; margin-left: 4px; }

.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.row.tight { grid-template-columns: 1fr auto; gap: 8px; align-items: center; margin-top: 10px; }

button, .primary { font: inherit; font-weight: 700; border-radius: 12px; padding: 13px 18px; cursor: pointer;
  border: 1px solid transparent; text-decoration: none; text-align: center; display: inline-block; }
.primary { background: linear-gradient(180deg, var(--gold), var(--flame)); color: #1a1206; border: none; }
form > .primary { width: 100%; font-size: 1.05rem; padding: 15px; margin-top: 4px; }
.ghost { background: transparent; color: var(--text); border-color: var(--line); }
.wide { width: 100%; margin-top: 10px; }
.small-btn { padding: 6px 12px; font-size: 0.85rem; }

.error { color: var(--bad); font-weight: 600; margin: 8px 0; }
.notice { background: var(--warn-bg); border-radius: 10px; padding: 10px 12px; font-weight: 600; }
.warn { background: var(--warn-bg); border-color: color-mix(in srgb, var(--gold) 50%, var(--line)); }
.center { text-align: center; }

.field { display: grid; grid-template-columns: 1fr auto; grid-template-areas: "label btn" "value btn";
  padding: 12px 0; border-bottom: 1px solid var(--line); align-items: center; }
.field .label { grid-area: label; color: var(--muted); font-size: 0.82rem; }
.field .value { grid-area: value; font-size: 1.2rem; font-weight: 700; font-variant-numeric: tabular-nums; word-break: break-word; }
.field button { grid-area: btn; }
.paylink { display: block; width: 100%; font-size: 1.1rem; margin: 6px 0 10px; }

.how summary { cursor: pointer; font-weight: 700; }
.how li { margin: 8px 0; color: var(--muted); }
.how strong { color: var(--text); }
footer { text-align: center; padding: 10px 0 28px; }
code { font-family: ui-monospace, Consolas, monospace; }