:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1a1d23;
  --muted: #5d6573;
  --border: #d9dde3;
  --accent: #2f6fed;
  --accent-text: #ffffff;
  --danger: #c92a2a;
  --input: #fbfbfc;
  --shadow: 0 1px 3px rgba(0, 0, 0, .06), 0 8px 24px rgba(0, 0, 0, .05);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --card: #181b21;
    --text: #e7e9ee;
    --muted: #9aa2b1;
    --border: #2b3039;
    --accent: #5b8cff;
    --accent-text: #0b0d12;
    --danger: #ff6b6b;
    --input: #12151a;
    --shadow: none;
  }
}

* { box-sizing: border-box; }

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

.wrap {
  max-width: 560px;
  margin: 0 auto;
  padding: 40px 16px 32px;
}

.brand { margin-bottom: 24px; }
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--accent);
  font-weight: 700;
  font-size: 1.35rem;
  text-decoration: none;
}
.logo span { color: var(--text); }
.tagline { margin: 4px 0 0; color: var(--muted); }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  box-shadow: var(--shadow);
}
.card h2 { margin: 0 0 8px; font-size: 1.2rem; }

.label {
  display: block;
  font-weight: 600;
  font-size: .9rem;
  margin: 0 0 6px;
}

textarea, input, select {
  width: 100%;
  font: inherit;
  color: var(--text);
  background: var(--input);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
}
textarea {
  resize: vertical;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .95rem;
}
textarea:focus, input:focus, select:focus {
  outline: 2px solid var(--accent);
  outline-offset: -1px;
  border-color: transparent;
}

.counter { text-align: right; font-size: .8rem; color: var(--muted); margin: 4px 0 16px; }

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 16px;
}
@media (max-width: 420px) { .grid { grid-template-columns: 1fr; } }

.extra { margin-bottom: 20px; }
.extra summary { cursor: pointer; color: var(--muted); font-size: .95rem; margin-bottom: 8px; }
.extra[open] summary { color: var(--text); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font: inherit;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { border-color: var(--muted); }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.danger { color: var(--danger); }
.btn.danger:hover { border-color: var(--danger); }
#create-btn, #reveal-btn { width: 100%; }

.copy-row { display: flex; gap: 8px; margin: 16px 0 8px; }
.copy-row input { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .85rem; min-width: 0; }

.actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; }

#open-password-wrap { margin: 16px 0; }
#reveal-btn { margin-top: 16px; }

.muted { color: var(--muted); margin: 0; }
.hint { color: var(--muted); font-size: .85rem; margin: 8px 0 0; }
.error { color: var(--danger); margin: 12px 0 0; font-size: .95rem; }
code { font-size: .85em; }

.foot { margin-top: 24px; text-align: center; font-size: .8rem; color: var(--muted); }

[hidden] { display: none !important; }