*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #0d0f17;
  --surface: #161925;
  --surface-2: #12141f;
  --border: #2a2f45;
  --accent: #6c63ff;
  --accent-2: #4f46e5;
  --text: #e8eaf6;
  --muted: #9ca3af;
  --weak: #ef4444;
  --fair: #f59e0b;
  --strong: #10b981;
  --very: #22d3ee;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 560px;
  margin: 0 auto;
  padding: 1rem 1.25rem 2rem;
}

.back-link {
  color: var(--muted);
  text-decoration: none;
  font-size: .9rem;
}
.back-link:hover { color: var(--text); }

h1 { font-size: 1.35rem; margin: .5rem 0; }
.sub { color: var(--muted); font-size: .9rem; margin-bottom: 1rem; }
.sub code { color: var(--accent); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1rem;
  margin: .75rem 0;
}

.output-card { padding-top: 1.1rem; }

.out {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 1.05rem;
  padding: .85rem .9rem;
  border-radius: 8px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  word-break: break-all;
  min-height: 3rem;
  display: flex;
  align-items: center;
  user-select: all;
}

.strength { margin: .85rem 0 .25rem; }
.strength-bar {
  height: 6px;
  background: var(--surface-2);
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--border);
}
.strength-fill {
  height: 100%;
  width: 0;
  background: var(--muted);
  transition: width .25s ease, background-color .25s ease;
}
.strength-fill.weak  { background: var(--weak); }
.strength-fill.fair  { background: var(--fair); }
.strength-fill.strong{ background: var(--strong); }
.strength-fill.very  { background: var(--very); }

.strength-meta {
  display: flex;
  justify-content: space-between;
  font-size: .82rem;
  margin-top: .35rem;
  color: var(--muted);
}
.strength-label.weak  { color: var(--weak); }
.strength-label.fair  { color: var(--fair); }
.strength-label.strong{ color: var(--strong); }
.strength-label.very  { color: var(--very); }

.actions {
  display: flex;
  gap: .5rem;
  margin-top: .9rem;
  flex-wrap: wrap;
}

.btn {
  padding: .7rem 1rem;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background-color .15s ease, transform .05s ease;
}
.btn:active { transform: translateY(1px); }
.btn:hover { background: var(--accent-2); }
.btn-primary { flex: 1 1 8rem; min-height: 2.6rem; }
.btn-copy {
  flex: 2 1 12rem;
  min-height: 2.8rem;
  font-size: 1rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}
.btn-copy.copied {
  background: var(--strong);
}

.row-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .9rem;
  cursor: default;
  margin-bottom: .25rem;
}
.row-label strong {
  font-variant-numeric: tabular-nums;
  color: var(--accent);
  font-size: 1rem;
}

input[type="range"] {
  width: 100%;
  margin: .35rem 0 .75rem;
  accent-color: var(--accent);
}

.charset-set {
  border: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .25rem .75rem;
}
.charset-set label,
.pron-label {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .9rem;
  cursor: pointer;
  padding: .25rem 0;
}
.charset-set code,
.pron-label code {
  color: var(--muted);
  font-size: .82rem;
}
.charset-set input[type="checkbox"],
.pron-label input[type="checkbox"] {
  accent-color: var(--accent);
  width: 1rem;
  height: 1rem;
  flex: none;
}
.pron-label small { color: var(--muted); display: block; font-size: .78rem; }

.charset-set:disabled,
.charset-set[disabled] { opacity: .5; pointer-events: none; }

.sep {
  border: none;
  border-top: 1px solid var(--border);
  margin: .75rem 0;
}

.details-card { padding: 0; }
.details-card summary {
  cursor: pointer;
  padding: .85rem 1rem;
  font-weight: 600;
  font-size: .9rem;
  list-style: none;
}
.details-card summary::-webkit-details-marker { display: none; }
.details-card summary::after {
  content: "▸";
  float: right;
  color: var(--muted);
  transition: transform .15s ease;
}
.details-card[open] summary::after { transform: rotate(90deg); display: inline-block; }
.details-card[open] { padding-bottom: 1rem; }
.details-card p,
.details-card ul { padding: 0 1rem; margin: .5rem 0; font-size: .85rem; color: var(--muted); line-height: 1.5; }
.details-card ul { padding-left: 2.25rem; }
.details-card code { color: var(--accent); font-size: .82rem; }
.details-card .muted { font-style: italic; }
.details-card strong { color: var(--text); }

footer { margin-top: 2rem; text-align: center; font-size: .78rem; color: var(--muted); }
footer a { color: var(--accent); }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.5rem;
  transform: translateX(-50%) translateY(.5rem);
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  padding: .55rem .9rem;
  border-radius: 999px;
  font-size: .85rem;
  box-shadow: 0 6px 20px rgba(0,0,0,.4);
  opacity: 0;
  transition: opacity .15s ease, transform .15s ease;
  pointer-events: none;
  z-index: 50;
}
.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 420px) {
  .charset-set { grid-template-columns: 1fr; }
  .actions { flex-direction: column; }
  .btn-primary, .btn-copy { flex: 1 1 auto; width: 100%; }
}