:root {
  --bg0: #f3efe6;
  --bg1: #e7eef2;
  --ink: #1a2228;
  --muted: #5c6b76;
  --card: rgba(255,255,255,.82);
  --line: rgba(26,34,40,.12);
  --accent: #0d6e6e;
  --ok: #1f7a4c;
  --btn-text: #ffffff;
  --shadow: 0 18px 50px rgba(26,34,40,.08);
  --radius: 22px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "Helvetica Neue", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(900px 500px at 10% -10%, color-mix(in srgb, var(--accent) 28%, transparent) 0%, transparent 55%),
    radial-gradient(700px 420px at 100% 0%, color-mix(in srgb, var(--accent) 12%, transparent) 0%, transparent 50%),
    linear-gradient(180deg, var(--bg0), var(--bg1));
}
body.theme-dark { --shadow: 0 18px 50px rgba(0,0,0,.45); }
main { width: min(440px, 100%); margin: 0 auto; padding: 1.5rem 1.1rem 3rem; }
.brand-row { display: flex; align-items: center; gap: .85rem; margin: 0 0 1.15rem; }
.brand-logo {
  width: 56px; height: 56px; object-fit: contain; border-radius: 14px;
  background: color-mix(in srgb, var(--card) 80%, transparent);
  border: 1px solid var(--line); flex-shrink: 0;
}
.brand { font-family: Georgia, "Times New Roman", serif; font-size: 1.45rem; letter-spacing: -.02em; margin: 0 0 .25rem; }
.sub { color: var(--muted); font-size: .95rem; margin: 0; line-height: 1.45; }
.panel {
  background: var(--card); backdrop-filter: blur(10px);
  border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 1.25rem 1.2rem 1.35rem;
}
.amount {
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(2rem, 8vw, 2.6rem); line-height: 1.1;
  margin: .2rem 0 .35rem; letter-spacing: -.03em;
}
.meta { color: var(--muted); font-size: .92rem; line-height: 1.45; }
.meta strong { color: var(--ink); font-weight: 600; }
.steps { display: grid; gap: .7rem; margin-top: 1.15rem; }
.btn {
  appearance: none; border: 0; border-radius: 14px; padding: .95rem 1rem;
  font: inherit; font-weight: 600; cursor: pointer; text-align: left;
  transition: transform .15s ease;
}
.btn:active { transform: scale(.98); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: var(--btn-text); box-shadow: 0 10px 24px color-mix(in srgb, var(--accent) 35%, transparent); }
.btn-secondary { background: color-mix(in srgb, var(--card) 90%, #fff); color: var(--ink); border: 1px solid var(--line); }
.btn-block { width: 100%; text-align: center; display: block; text-decoration: none; }
.btn small { display: block; font-weight: 400; opacity: .85; margin-top: .25rem; font-size: .82rem; line-height: 1.35; }
.field { display: grid; gap: .35rem; margin-top: .85rem; }
.field label { font-size: .88rem; font-weight: 600; color: var(--muted); }
.field input, .field select {
  font: inherit; padding: .75rem .85rem; border-radius: 12px;
  border: 1px solid var(--line); background: #fff; color: var(--ink);
}
body.theme-dark .field input, body.theme-dark .field select {
  background: rgba(255,255,255,.06); color: var(--ink);
}
.field-row { display: grid; grid-template-columns: 1.4fr .9fr; gap: .55rem; }
.help { margin-top: 1rem; padding-top: 1rem; border-top: 1px dashed var(--line); }
.help summary { cursor: pointer; color: var(--muted); font-weight: 600; list-style: none; }
.help summary::-webkit-details-marker { display: none; }
.help p { color: var(--muted); font-size: .9rem; line-height: 1.45; margin: .55rem 0 0; }
.help a { color: var(--accent); font-weight: 600; }
.qr-wrap { display: flex; flex-direction: column; align-items: center; gap: .85rem; margin-top: 1rem; }
#qr {
  width: min(260px, 78vw); min-height: min(260px, 78vw);
  background: #fff; border-radius: 18px; border: 1px solid var(--line); padding: .65rem;
  display: flex; align-items: center; justify-content: center;
}
#qr img, #qr canvas, #qr table { max-width: 100% !important; height: auto !important; }
.copy {
  width: 100%; font-size: .78rem; word-break: break-all; white-space: pre-wrap;
  background: color-mix(in srgb, var(--card) 85%, transparent); border: 1px solid var(--line);
  border-radius: 12px; padding: .65rem .75rem; color: var(--muted);
}
.status {
  margin-top: .9rem; padding: .75rem .85rem; border-radius: 12px;
  background: color-mix(in srgb, var(--accent) 12%, transparent); color: var(--accent); font-weight: 600; font-size: .95rem;
}
.status.ok { background: color-mix(in srgb, var(--ok) 18%, transparent); color: var(--ok); }
.status.err { background: rgba(180,50,40,.1); color: #8a2a22; }
.quote { margin-top: .85rem; font-size: .9rem; color: var(--muted); line-height: 1.45; }
.back {
  margin-top: .85rem; background: transparent; border: 0; color: var(--muted);
  font: inherit; cursor: pointer; text-decoration: underline; padding: 0;
}
.hidden { display: none !important; }
.hp { position: absolute; left: -10000px; opacity: 0; height: 0; width: 0; overflow: hidden; }
.footer { margin-top: 1.25rem; text-align: center; color: var(--muted); font-size: .78rem; line-height: 1.4; }
.chips { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .55rem; }
.chip {
  border: 1px solid var(--line); background: color-mix(in srgb, var(--card) 90%, #fff); border-radius: 999px;
  padding: .35rem .7rem; font: inherit; font-size: .85rem; cursor: pointer; color: var(--ink);
}
.chip:hover { border-color: var(--accent); color: var(--accent); }