:root {
  --indigo: #1e1b4b;
  --indigo-600: #3730a3;
  --gold: #c6a15b;
  --gold-soft: #e8d9b8;
  --bg: #f5f5f7;
  --card: #ffffff;
  --ink: #1a1a2e;
  --muted: #6b7280;
  --line: #e5e7eb;
  --error: #b91c1c;
  --warn-bg: #fef6e7;
  --warn-ink: #7a5a12;
  --radius: 12px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, Helvetica, Arial, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f0e1e; --card: #1a1830; --ink: #ece9f5; --muted: #9a97b5;
    --line: #2c2a45; --warn-bg: #2b2410; --warn-ink: #e8d9b8;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--font); line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: 560px; margin: 0 auto; padding: 40px 20px 64px; }

.brand { display: flex; align-items: center; gap: 14px; margin-bottom: 24px; }
.brand .mark {
  width: 40px; height: 40px; border-radius: 10px; flex: none;
  background: linear-gradient(135deg, var(--indigo), var(--indigo-600));
  box-shadow: inset 0 0 0 2px var(--gold);
}
.brand h1 { font-size: 1.15rem; margin: 0; letter-spacing: -0.01em; }
.brand .tag { margin: 2px 0 0; color: var(--muted); font-size: 0.85rem; }

.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 24px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.04), 0 8px 24px rgba(30,27,75,0.05);
}
.card + .card { margin-top: 16px; }
h2 { margin: 0 0 6px; font-size: 1.05rem; }

label { display: block; font-weight: 600; font-size: 0.85rem; margin: 16px 0 6px; }
label:first-child { margin-top: 0; }
.muted { color: var(--muted); font-weight: 400; }

input, textarea, select {
  width: 100%; padding: 10px 12px; font: inherit; color: var(--ink);
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
}
input:focus, textarea:focus, select:focus {
  outline: none; border-color: var(--indigo-600);
  box-shadow: 0 0 0 3px rgba(55,48,163,0.15);
}
textarea { resize: vertical; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
input[readonly], #secretOut { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }

.row { display: flex; gap: 8px; }
.row input { flex: 1; }

button { font: inherit; font-weight: 600; border-radius: 8px; cursor: pointer; padding: 10px 16px; border: 1px solid transparent; }
button:focus-visible { outline: 3px solid rgba(55,48,163,0.4); outline-offset: 2px; }
.primary { width: 100%; margin-top: 20px; color: #fff; background: var(--indigo-600); border-color: var(--indigo-600); }
.primary:hover { background: var(--indigo); }
.primary:disabled { opacity: 0.6; cursor: default; }
.ghost { background: transparent; border-color: var(--line); color: var(--ink); white-space: nowrap; }
.ghost:hover { border-color: var(--indigo-600); color: var(--indigo-600); }

.fineprint { margin: 16px 0 0; font-size: 0.8rem; color: var(--muted); }
.error { margin: 12px 0 0; color: var(--error); font-size: 0.88rem; }
.warn { background: var(--warn-bg); color: var(--warn-ink); padding: 12px 14px; border-radius: 8px; font-size: 0.88rem; margin: 0 0 16px; }
.note { background: var(--bg); border: 1px dashed var(--gold); border-radius: 8px; padding: 8px 12px; font-size: 0.85rem; color: var(--muted); margin: 0 0 12px; }
.hidden { display: none; }