:root {
  --navy: #0f2a3d;
  --navy-2: #1d4a66;
  --gold: #c9a227;
  --gold-soft: #f6eccd;
  --ink: #18222b;
  --muted: #5b6770;
  --line: #e3e7ea;
  --bg: #f5f6f7;
  --card: #ffffff;
  --ok: #1d7a4b;
  --warn: #9a5b00;
  --warn-soft: #fff1db;
  --danger: #b3261e;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

main {
  max-width: 440px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}

header.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  color: var(--navy);
  font-weight: 800;
  font-size: 20px;
}

header.brand .logo {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--navy);
  display: grid;
  place-items: center;
}

.strip {
  background: var(--gold-soft);
  color: #6b5216;
  text-align: center;
  font-size: 11px;
  letter-spacing: 1px;
  font-weight: 600;
  padding: 3px;
}

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 20px;
  margin-bottom: 14px;
}

.hero {
  background: linear-gradient(135deg, var(--navy), var(--navy-2));
  color: #fff;
  border: 0;
  text-align: center;
}

.hero .from { color: rgba(255, 255, 255, 0.8); margin: 6px 0 2px; }
.hero .amount { font-size: 34px; font-weight: 750; letter-spacing: -0.5px; color: #fff; }
.hero .amount.gold { color: var(--gold); }
.hero .value { color: rgba(255, 255, 255, 0.7); font-size: 14px; }
.hero .until { color: rgba(255, 255, 255, 0.6); font-size: 13px; margin-top: 8px; }

h1 { font-size: 24px; line-height: 1.25; margin: 0 0 8px; color: var(--navy); }
h2 { font-size: 17px; margin: 0 0 10px; color: var(--navy); }
p { margin: 0 0 10px; }
.muted { color: var(--muted); font-size: 14px; }

ol.steps { margin: 0; padding: 0; list-style: none; counter-reset: step; }
ol.steps > li { position: relative; padding: 0 0 14px 40px; counter-increment: step; }
ol.steps > li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--navy);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  display: grid;
  place-items: center;
}
ol.steps > li:last-child { padding-bottom: 0; }

.button {
  display: block;
  width: 100%;
  margin: 10px 0 4px;
  padding: 14px 16px;
  border-radius: 12px;
  border: 0;
  background: var(--navy);
  color: #fff;
  font: inherit;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
}
.button.secondary { background: #fff; color: var(--navy); border: 1.5px solid var(--navy); }
.button.gold { background: var(--gold); color: var(--navy); }

.code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 17px;
  letter-spacing: 1px;
  word-spacing: 4px;
  background: var(--bg);
  border-radius: 10px;
  padding: 10px 12px;
  text-align: center;
  user-select: all;
  white-space: pre-line;
  overflow-wrap: anywhere;
}

.note {
  border-radius: 12px;
  padding: 12px 14px;
  font-size: 15px;
  margin-bottom: 14px;
  background: #e8eef4;
  color: var(--navy);
}
.note.warn { background: var(--warn-soft); color: var(--warn); }
.note.ok { background: #e3f4ea; color: var(--ok); }

details.help { margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--line); font-size: 14px; }
details.help summary { cursor: pointer; font-weight: 700; color: var(--navy); }
details.help ul { margin: 8px 0 0; padding-left: 18px; }
details.help li { margin-bottom: 8px; }
details.help li.mine { list-style: none; margin-left: -18px; padding: 8px 10px; border-radius: 8px; background: var(--gold-soft); }

.small { font-size: 13px; color: var(--muted); }
.center { text-align: center; }
.hidden { display: none !important; }

footer { margin-top: 24px; text-align: center; font-size: 12px; color: var(--muted); }
footer a { color: var(--muted); }