/* =====================================================
   Password Generator — password-generator.css
   Chedders Tools · Bootstrap 5 base
   ===================================================== */

/* --- Base & Variables --- */
:root {
  --primary: #0b1f3a;
  --primary-light: #16345f;
  --background: #ffffff;
  --surface: #f8f9fa;
  --text: #111111;
  --muted: #6c757d;
  --border: #e5e7eb;
  --shadow: rgba(0,0,0,0.05);
}

[data-theme="dark"] {
  --background: #081120;
  --surface: #0f1c2e;
  --text: #ffffff;
  --muted: #b0b7c3;
  --border: rgba(255,255,255,0.08);
  --shadow: rgba(0,0,0,0.3);
}

/* --- Layout Foundation --- */
*, *::before, *::after { box-sizing: border-box; }

body {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
  background-color: var(--background);
  margin: 0;
  transition: background-color 0.25s ease, color 0.25s ease;
}

.container-xl {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Navbar --- */
.navbar {
  height: 60px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

.navbar .container-xl {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.navbar-brand {
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 1px;
}

.brand-text { font-weight: 700; color: var(--primary); font-size: 16px; }
.brand-dot  { color: var(--primary); font-weight: 700; font-size: 16px; }
.brand-tools{ font-weight: 400; color: var(--muted); font-size: 16px; }

[data-theme="dark"] .brand-text,
[data-theme="dark"] .brand-dot { color: #ffffff; }

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-back {
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}
.nav-back:hover { color: var(--primary); }
[data-theme="dark"] .nav-back:hover { color: #ffffff; }

.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 10px;
  cursor: pointer;
  transition: border-color 0.2s, background-color 0.2s;
}
.theme-toggle:hover { background: var(--background); }
.theme-icon { font-size: 14px; line-height: 1; display: block; }

/* --- Page Header --- */
.tool-header {
  padding: 40px 0 24px;
  border-bottom: 1px solid var(--border);
}

.tool-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  margin: 0;
  line-height: 1.2;
  transition: color 0.25s ease;
}
[data-theme="dark"] .tool-title { color: #ffffff; }

.tool-description {
  font-size: 15px;
  color: var(--muted);
  margin: 6px 0 0;
}

/* --- Tool Main --- */
.tool-main { padding: 32px 0 80px; }

/* --- Tool Card --- */
.tool-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  box-shadow: 0 2px 8px var(--shadow);
  max-width: 680px;
  transition: background-color 0.25s ease, border-color 0.25s ease;
}

/* --- Field Groups --- */
.field-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}

.field-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin: 0;
}

/* --- Slider --- */
.slider-label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.length-value {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
  font-family: 'Courier New', Courier, monospace;
  min-width: 32px;
  text-align: right;
}
[data-theme="dark"] .length-value { color: #ffffff; }

.length-slider {
  width: 100%;
  height: 6px;
  appearance: none;
  background: var(--border);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
  accent-color: var(--primary);
  transition: background-color 0.25s ease;
}

.length-slider:focus {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

.slider-bounds {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--muted);
  margin-top: -4px;
}

/* --- Checkboxes --- */
.options-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 24px;
}

.option-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text);
  cursor: pointer;
  user-select: none;
}

.option-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--primary);
  cursor: pointer;
  flex-shrink: 0;
}

/* --- Error --- */
.field-error {
  font-size: 13px;
  color: #dc3545;
  margin: 0;
  min-height: 18px;
}

/* --- Buttons --- */
.btn-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.btn-primary-tool {
  background: var(--primary);
  color: #ffffff;
  border: none;
  border-radius: 6px;
  padding: 10px 24px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  min-height: 44px;
  transition: background-color 0.2s;
}
.btn-primary-tool:hover { background: var(--primary-light); }

.btn-secondary-tool {
  background: var(--background);
  color: var(--primary);
  border: 1px solid var(--primary);
  border-radius: 6px;
  padding: 10px 24px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  min-height: 44px;
  transition: background-color 0.2s, color 0.2s;
}
.btn-secondary-tool:hover { background: var(--primary); color: #ffffff; }

[data-theme="dark"] .btn-secondary-tool {
  border-color: var(--border);
  color: var(--text);
}
[data-theme="dark"] .btn-secondary-tool:hover {
  background: var(--primary-light);
  color: #ffffff;
  border-color: var(--primary-light);
}

/* --- Output Box --- */
.output-box {
  background: var(--background);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 16px 20px;
  min-height: 64px;
  display: flex;
  align-items: center;
  transition: background-color 0.25s ease, border-color 0.25s ease;
  margin-bottom: 12px;
  word-break: break-all;
}

.output-placeholder {
  color: var(--muted);
  font-size: 15px;
}

.password-text {
  font-family: 'Courier New', Courier, monospace;
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.04em;
  line-height: 1.4;
}

/* --- Strength --- */
.strength-row {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 22px;
}

.strength-label {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.strength-bar-wrap {
  display: flex;
  gap: 4px;
  flex: 1;
  max-width: 120px;
}

.strength-segment {
  height: 4px;
  flex: 1;
  border-radius: 2px;
  background: var(--border);
  transition: background-color 0.2s;
}

/* Strength colours */
.strength--weak    .strength-label { color: #dc3545; }
.strength--fair    .strength-label { color: #fd7e14; }
.strength--strong  .strength-label { color: #198754; }
.strength--vstrong .strength-label { color: #0d6efd; }

.strength--weak    .strength-segment:nth-child(1) { background: #dc3545; }
.strength--fair    .strength-segment:nth-child(1),
.strength--fair    .strength-segment:nth-child(2) { background: #fd7e14; }
.strength--strong  .strength-segment:nth-child(1),
.strength--strong  .strength-segment:nth-child(2),
.strength--strong  .strength-segment:nth-child(3) { background: #198754; }
.strength--vstrong .strength-segment { background: #0d6efd; }

/* --- Footer --- */
.site-footer {
  padding: 24px 0;
  border-top: 1px solid var(--border);
  transition: border-color 0.25s ease;
}

.footer-text {
  font-size: 13px;
  color: var(--muted);
  text-align: center;
  margin: 0;
}

.footer-text a { color: var(--primary); text-decoration: none; }
[data-theme="dark"] .footer-text a { color: #ffffff; }
.footer-text a:hover { text-decoration: underline; }

/* --- Responsive --- */
@media (max-width: 575px) {
  .tool-card { padding: 16px; }
  .tool-title { font-size: 22px; }
  .btn-primary-tool, .btn-secondary-tool { width: 100%; }
  .options-grid { grid-template-columns: 1fr; }
  .password-text { font-size: 18px; }
}