:root {
  --bg: #140c08;
  --ink: #f4e6d4;
  --muted: #b89a7a;
  --line: rgba(244, 198, 140, 0.22);
  --ember: #e24a2b;
  --gold: #e8b86d;
  --paper: #1d140f;
  --paper-2: #271910;
  --ok: #d7c39a;
  --danger: #ff6b4a;
  --shadow: 0 30px 80px rgba(0, 0, 0, 0.55);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: "Source Han Serif SC", "Songti SC", "Noto Serif SC", "STSong", Georgia, serif;
  background:
    radial-gradient(1200px 500px at 50% -10%, rgba(226, 74, 43, 0.18), transparent 55%),
    radial-gradient(800px 400px at 80% 110%, rgba(232, 184, 109, 0.08), transparent 50%),
    var(--bg);
  color: var(--ink);
  letter-spacing: 0.02em;
}

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  opacity: 0.09;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='.85'/%3E%3C/svg%3E");
}

.top {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 24px 12px;
  text-align: center;
}
.brand {
  color: var(--gold);
  text-decoration: none;
  font-size: 42px;
  font-weight: 600;
  letter-spacing: 0.38em;
  margin-left: 0.38em;
}
.tag {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.18em;
}

.sheet {
  max-width: 720px;
  margin: 20px auto 80px;
  padding: 36px 40px 40px;
  background:
    linear-gradient(180deg, rgba(232, 184, 109, 0.06), transparent 28%),
    var(--paper);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  position: relative;
}
.sheet::before {
  content: "";
  position: absolute;
  top: 18px;
  left: 18px;
  right: 18px;
  bottom: 18px;
  border: 1px solid rgba(232, 184, 109, 0.08);
  pointer-events: none;
}

h1 {
  font-size: 22px;
  font-weight: 600;
  margin: 0 0 8px;
  letter-spacing: 0.16em;
}
.lead {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
  margin: 0 0 24px;
}

label {
  display: block;
  font-size: 12px;
  color: var(--gold);
  letter-spacing: 0.22em;
  margin: 18px 0 8px;
}
textarea, input[type="password"], input[type="text"], select {
  width: 100%;
  background: var(--paper-2);
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 12px 14px;
  font: 15px/1.6 ui-sans-serif, system-ui, sans-serif;
  outline: none;
}
textarea { min-height: 220px; resize: vertical; }
textarea:focus, input:focus, select:focus {
  border-color: var(--gold);
}

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.row.triple {
  grid-template-columns: 1fr 1fr 1fr;
}
@media (max-width: 640px) {
  .sheet { padding: 24px 18px; margin: 12px 12px 60px; }
  .row, .row.triple { grid-template-columns: 1fr; }
  .brand { font-size: 32px; }
}

.actions { margin-top: 28px; display: flex; gap: 12px; flex-wrap: wrap; }
button, .btn {
  appearance: none;
  border: 1px solid var(--ember);
  background: linear-gradient(180deg, #c43a22, #8d1f12);
  color: #fff6ea;
  padding: 12px 22px;
  letter-spacing: 0.22em;
  font: 13px ui-sans-serif, system-ui, sans-serif;
  cursor: pointer;
}
button.ghost, .btn.ghost {
  background: transparent;
  color: var(--gold);
  border-color: var(--line);
}
button:disabled { opacity: 0.45; cursor: not-allowed; }

.warn {
  margin-top: 16px;
  padding: 12px 14px;
  border: 1px solid rgba(226, 74, 43, 0.45);
  color: var(--danger);
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 13px;
  line-height: 1.6;
}
.okbox {
  margin-top: 16px;
  padding: 16px;
  border: 1px solid var(--line);
  background: rgba(232, 184, 109, 0.06);
}
.okbox code, .linkbox {
  display: block;
  word-break: break-all;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ok);
  margin: 8px 0 0;
}
.plain {
  white-space: pre-wrap;
  word-break: break-word;
  font-family: ui-sans-serif, system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  min-height: 160px;
  padding: 16px;
  background: var(--paper-2);
  border: 1px solid var(--line);
}

.seal {
  width: 88px;
  height: 88px;
  margin: 8px auto 20px;
  border-radius: 50%;
  border: 2px solid rgba(226, 74, 43, 0.7);
  display: grid;
  place-items: center;
  color: var(--ember);
  letter-spacing: 0.28em;
  font-size: 13px;
  transform: rotate(-8deg);
  box-shadow: inset 0 0 24px rgba(226, 74, 43, 0.25);
}
.center { text-align: center; }
.meta {
  color: var(--muted);
  font-size: 12px;
  font-family: ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0.08em;
}
.foot {
  max-width: 720px;
  margin: 0 auto 40px;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 12px;
  font-family: ui-sans-serif, system-ui, sans-serif;
  letter-spacing: 0.06em;
}
@media (max-width: 640px) {
  .foot { flex-direction: column; text-align: center; }
}