*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --bg: #0a0a12;
  --bg-card: #13131f;
  --bg-elevated: #1c1c30;
  --bg-hover: #262640;
  --border: #282845;
  --border-accent: #383860;
  --text: #eeeef5;
  --text-secondary: #9494b8;
  --text-muted: #606088;
  --accent: #2b6bff;
  --accent-hover: #6a4ae6;
  --accent-glow: rgba(124,92,252,.25);
  --accent-subtle: rgba(124,92,252,.12);
  --success: #34d399;
  --warning: #fbbf24;
  --danger: #f87171;
  --info: #60a5fa;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --shadow: 0 8px 40px rgba(0,0,0,.5);
  --transition: .28s cubic-bezier(.4,0,.2,1);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --mono: 'JetBrains Mono', monospace;
}
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background-image:
    radial-gradient(ellipse at 20% 50%, rgba(124,92,252,.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 50%, rgba(124,92,252,.05) 0%, transparent 50%);
}
::selection { background: var(--accent); color: #fff; }
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg-card); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

.container {
  width: 100%;
  max-width: 600px;
  margin: 0 auto;
}

.header {
  text-align: center;
  margin-bottom: 32px;
}
.header h1 {
  font-size: 32px;
  font-weight: 900;
  background: linear-gradient(135deg, var(--accent) 0%, #4d86ff 50%, #f472b6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.header p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-top: 6px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 20px;
  transition: border-color var(--transition);
  box-shadow: var(--shadow);
}
.card:hover { border-color: var(--border-accent); }
.card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  text-transform: uppercase;
  letter-spacing: .5px;
}

.pw-display-wrap {
  position: relative;
  margin-bottom: 16px;
}
.pw-display {
  width: 100%;
  padding: 20px 56px 20px 24px;
  background: var(--bg);
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--mono);
  font-size: 22px;
  letter-spacing: 2px;
  word-break: break-all;
  color: var(--text);
  text-align: center;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  cursor: pointer;
  position: relative;
  user-select: all;
}
.pw-display:hover { border-color: var(--accent); box-shadow: 0 0 24px var(--accent-glow); }
.pw-display.weak { border-color: var(--danger); }
.pw-display.medium { border-color: var(--warning); }
.pw-display.strong { border-color: var(--success); }
.pw-display .placeholder {
  color: var(--text-muted);
  font-family: var(--font);
  letter-spacing: 0;
  font-weight: 500;
  font-size: 16px;
  user-select: none;
}
.pw-copy-btn {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border);
  background: var(--bg-elevated);
  color: var(--text-secondary);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  opacity: 0;
}
.pw-display-wrap:hover .pw-copy-btn { opacity: 1; }
.pw-copy-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.strength-section {
  margin-bottom: 20px;
}
.strength-bars {
  display: flex;
  gap: 6px;
  margin-bottom: 6px;
}
.strength-bar {
  flex: 1;
  height: 5px;
  border-radius: 3px;
  background: var(--bg);
  border: 1px solid var(--border);
  transition: all .4s cubic-bezier(.4,0,.2,1);
  overflow: hidden;
  position: relative;
}
.strength-bar .fill {
  height: 100%;
  width: 0;
  border-radius: 2px;
  transition: all .4s cubic-bezier(.4,0,.2,1);
}
.strength-bar.active .fill {
  width: 100%;
}
.strength-bar .fill.weak { background: var(--danger); box-shadow: 0 0 8px rgba(248,113,113,.3); }
.strength-bar .fill.medium { background: var(--warning); box-shadow: 0 0 8px rgba(251,191,36,.3); }
.strength-bar .fill.strong { background: var(--success); box-shadow: 0 0 8px rgba(52,211,153,.3); }

.strength-info {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
}
.strength-label {
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: color var(--transition);
}
.strength-label.weak { color: var(--danger); }
.strength-label.medium { color: var(--warning); }
.strength-label.strong { color: var(--success); }
.strength-stats {
  color: var(--text-muted);
  font-size: 12px;
  display: flex;
  gap: 14px;
}
.strength-stats span { white-space: nowrap; }
.strength-stats .num { color: var(--text-secondary); font-weight: 600; font-family: var(--mono); }
 
.options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
@media (max-width: 480px) { .options-grid { grid-template-columns: 1fr; } }

.option-group label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: .5px;
  display: block;
  margin-bottom: 8px;
}
.option-group .value-display {
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--accent);
  text-align: center;
  margin-top: 4px;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 3px;
  outline: none;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--text);
  cursor: pointer;
  transition: transform .15s;
  box-shadow: 0 2px 10px rgba(0,0,0,.4);
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.15); }

input[type="number"] {
  width: 100%;
  padding: 10px 14px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  transition: all var(--transition);
  outline: none;
  text-align: center;
}
input[type="number"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
 
.checkbox-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
@media (max-width: 360px) { .checkbox-group { grid-template-columns: 1fr; } }

.checkbox-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: all var(--transition);
  user-select: none;
}
.checkbox-item:hover { border-color: var(--border-accent); }
.checkbox-item.active {
  border-color: var(--accent);
  background: var(--accent-subtle);
}
.checkbox-item input[type="checkbox"] {
  accent-color: var(--accent);
  width: 18px;
  height: 18px;
  cursor: pointer;
  flex-shrink: 0;
}
.checkbox-item .label-text {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}
.checkbox-item.active .label-text { color: var(--text); }
.checkbox-item .sample {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-muted);
  margin-left: auto;
}
 
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  width: 100%;
  font-size: 16px;
  padding: 14px 24px;
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px var(--accent-glow);
}
.btn-primary:active { transform: translateY(0); }
.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  background: var(--bg-hover);
  color: var(--text);
  border-color: var(--border-accent);
  transform: translateY(-1px);
}
.btn-sm { padding: 8px 14px; font-size: 12px; }
.btn-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
 
.pw-list-wrap {
  margin-top: 20px;
}
.pw-list-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}
.pw-list-header .title {
  font-size: 13px;
  color: var(--text-secondary);
  font-weight: 500;
}
.pw-list {
  max-height: 280px;
  overflow-y: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
}
.pw-list-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 13px;
  transition: background var(--transition);
}
.pw-list-item:last-child { border-bottom: none; }
.pw-list-item:hover { background: var(--bg-elevated); }
.pw-list-item .index {
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 11px;
  min-width: 24px;
}
.pw-list-item .pw-text {
  flex: 1;
  margin: 0 10px;
  word-break: break-all;
  color: var(--text);
  cursor: pointer;
}
.pw-list-item .pw-text:hover { color: var(--accent); }
.pw-list-item .pw-actions { display: flex; gap: 4px; }
.pw-list-item .pw-actions button {
  width: 30px;
  height: 30px;
  border-radius: var(--radius-xs);
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  transition: all var(--transition);
}
.pw-list-item .pw-actions button:hover {
  background: var(--bg-hover);
  color: var(--text);
}
 
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--bg-elevated);
  border: 1px solid var(--border-accent);
  border-radius: 12px;
  padding: 13px 24px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: var(--shadow);
  opacity: 0;
  transition: all var(--transition);
  z-index: 999;
  pointer-events: none;
  white-space: nowrap;
}
.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }
.toast.success { border-color: var(--success); }
.toast.error { border-color: var(--danger); }
 
@media (max-width: 480px) {
  .card { padding: 20px; }
  .header h1 { font-size: 24px; }
  .pw-display { font-size: 18px; padding: 16px 48px 16px 16px; }
}
 
.entropy-meter {
  margin-top: 16px;
  padding: 16px;
  background: var(--bg);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.entropy-meter .row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.entropy-meter .metric {
  text-align: center;
  flex: 1;
  min-width: 100px;
}
.entropy-meter .metric .value {
  font-family: var(--mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
}
.entropy-meter .metric .label {
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-top: 2px;
}