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

:root {
  --hexa-green: #62C467;
  --hexa-blue: #0099FF;    
  --bg: #f5f6f8;
  --surface: #ffffff;
  --surface-2: #f0f1f4;
  --border: #e0e2ea;
  --border-hover: #b8bdd0;
  --text: #1a1d2e;
  --text-muted: #7c84a0;
  --accent: #2563eb;
  --accent-dim: rgba(37, 99, 235, 0.08);
  --accent-hover: #1d4ed8;
  --red: #dc2626;
  --orange: #ea580c;
  --yellow: #ca8a04;
  --green: #16a34a;
  --radius: 10px;
  --mono: 'IBM Plex Mono', monospace;
  --sans: 'IBM Plex Sans', sans-serif;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 48px 16px 80px;
}

/* Header */
.page-header {
  text-align: center;
  margin-bottom: 40px;
}
.logo {
  display: inline-block;
  margin-bottom: 24px;
}
.logo img {
  height: 60px;
  width: auto;
}
h1 {
  font-family: var(--mono);
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}
.subtitle {
  font-size: 14px;
  color: var(--text-muted);
}

/* Main card */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  width: 100%;
  max-width: 600px;
  overflow: hidden;
}

/* Output area */
.output-area {
  padding: 28px 28px 20px;
  border-bottom: 1px solid var(--border);
}
.password-display {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  min-height: 62px;
}
.password-text {
  font-family: var(--mono);
  font-size: clamp(13px, 2.5vw, 17px);
  font-weight: 400;
  color: var(--accent);
  flex: 1;
  word-break: break-all;
  letter-spacing: 0.02em;
  line-height: 1.5;
}
.password-text.placeholder {
  color: var(--text-muted);
  font-size: 13px;
}
.btn-icon {
  background: none;
  border: 1px solid var(--border);
  border-radius: 7px;
  width: 36px; height: 36px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  color: var(--text-muted);
  transition: all 0.15s;
  flex-shrink: 0;
}
.btn-icon:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-dim); }
.btn-icon svg { width: 16px; height: 16px; }

/* Strength meter */
.strength-row {
  display: flex;
  align-items: center;
  gap: 12px;
}
.strength-bars {
  display: flex;
  gap: 4px;
  flex: 1;
}
.strength-bar {
  height: 4px;
  flex: 1;
  border-radius: 2px;
  background: var(--border);
  transition: background 0.3s;
}
.strength-label {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  min-width: 72px;
  text-align: right;
  color: var(--text-muted);
}
.crack-time {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 6px;
  font-family: var(--mono);
}

/* Mode tabs */
.mode-tabs {
  display: flex;
  padding: 16px 28px 0;
  gap: 4px;
  border-bottom: 1px solid var(--border);
}
.tab {
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  border: none;
  background: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: all 0.15s;
  font-family: var(--sans);
  white-space: nowrap;
}
.tab:hover { color: var(--text); }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }

/* Options panels */
.options-panel {
  padding: 24px 28px;
  display: none;
}
.options-panel.active { display: block; }

.option-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  gap: 16px;
}
.option-row:last-child { margin-bottom: 0; }

.option-label {
  font-size: 13px;
  color: var(--text);
  font-weight: 500;
  flex-shrink: 0;
}
.option-sublabel {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Slider */
.slider-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  justify-content: flex-end;
}
.slider-value {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  min-width: 28px;
  text-align: right;
}
input[type="range"] {
  -webkit-appearance: none;
  width: 160px;
  height: 4px;
  border-radius: 2px;
  background: var(--border);
  outline: none;
  cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px var(--accent);
}

/* Toggle */
.toggle {
  position: relative;
  width: 40px; height: 22px;
  flex-shrink: 0;
}
.toggle input { opacity: 0; width: 0; height: 0; }
.toggle-track {
  position: absolute;
  inset: 0;
  background: var(--border);
  border-radius: 11px;
  cursor: pointer;
  transition: background 0.2s;
}
.toggle-track::after {
  content: '';
  position: absolute;
  width: 16px; height: 16px;
  border-radius: 50%;
  background: #fff;
  top: 3px; left: 3px;
  transition: transform 0.2s;
}
.toggle input:checked + .toggle-track { background: var(--accent); }
.toggle input:checked + .toggle-track::after { transform: translateX(18px); }

/* Select */
select {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 7px;
  color: var(--text);
  font-size: 13px;
  font-family: var(--sans);
  padding: 6px 10px;
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s;
}
select:hover, select:focus { border-color: var(--accent); }

/* Number stepper */
.stepper {
  display: flex;
  align-items: center;
  border: 1px solid var(--border);
  border-radius: 7px;
  overflow: hidden;
}
.stepper button {
  background: var(--surface);
  border: none;
  color: var(--text-muted);
  width: 30px; height: 30px;
  cursor: pointer;
  font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.15s;
}
.stepper button:hover { color: var(--accent); background: var(--accent-dim); }
.stepper-val {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  min-width: 28px;
  text-align: center;
  background: var(--surface);
  padding: 0 4px;
  line-height: 30px;
}

/* Generate button */
.btn-generate {
  display: block;
  width: calc(100% - 56px);
  margin: 0 28px 28px;
  padding: 13px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  font-family: var(--sans);
  cursor: pointer;
  letter-spacing: 0.02em;
  transition: background 0.15s, transform 0.1s;
}
.btn-generate:hover { background: var(--accent-hover); }
.btn-generate:active { transform: scale(0.99); }

/* Divider */
.divider {
  height: 1px;
  background: var(--border);
  margin: 4px 0 20px;
}

/* Copy feedback */
.copy-feedback {
  font-size: 11px;
  font-family: var(--mono);
  color: var(--green);
  opacity: 0;
  transition: opacity 0.2s;
  margin-left: 4px;
}
.copy-feedback.show { opacity: 1; }

/* Footer note */
.page-footer {
  margin-top: 28px;
  font-size: 12px;
  color: var(--text-muted);
  text-align: center;
  max-width: 480px;
  line-height: 1.6;
}
.page-footer a { color: var(--accent); text-decoration: none; }
.page-footer a:hover { text-decoration: underline; }

@media (max-width: 480px) {
  .mode-tabs { padding: 12px 16px 0; gap: 0; }
  .tab { padding: 8px 11px; font-size: 12px; }
  .options-panel { padding: 20px 16px; }
  .output-area { padding: 20px 16px 16px; }
  .btn-generate { width: calc(100% - 32px); margin: 0 16px 20px; }
  input[type="range"] { width: 120px; }
}

#checkerCard {
  margin-top: 20px;
  max-width: 600px;
  width: 100%;
}

.checker-title {
  font-family: var(--mono);
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
  margin-bottom: 4px;
}

.checker-desc {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 16px;
}

#checkerInput {
  border: none;
  outline: none;
  background: transparent;
  width: 100%;
  font-size: clamp(13px, 2.5vw, 17px);
}

#checkerInput::placeholder {
  color: var(--text-muted);
  font-size: 13px;
  font-family: var(--mono);
}

.eye-icon { display: block; }
.eye-icon--hidden { display: none; }

#checkerInput:-webkit-autofill {
  -webkit-box-shadow: 0 0 0 100px var(--bg) inset;
  -webkit-text-fill-color: var(--text);
}