/* GOsensit design tokens */
:root {
  --color-primary: #F39200;
  --color-primary-hover: #D97E00;
  --color-primary-subtle: #FEF3E2;

  --color-bg: #FAFAFA;
  --color-surface: #FFFFFF;
  --color-surface-2: #F5F5F5;
  --color-border: #E0E0E0;
  --color-border-subtle: #EBEBEB;

  --color-text: #1C1C1E;
  --color-text-secondary: #6C6C70;
  --color-text-tertiary: #AEAEB2;

  --color-success: #34C759;
  --color-success-bg: #F0FBF4;
  --color-warning: #FF9500;
  --color-warning-bg: #FFF8EC;
  --color-error: #FF3B30;
  --color-error-bg: #FFF2F1;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;

  --shadow-sm: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,.10), 0 2px 4px rgba(0,0,0,.06);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Cascadia Code', 'Consolas', monospace;

  --motion-fast: 120ms ease;
  --motion-base: 200ms ease;
}

[data-theme="dark"] {
  --color-bg: #1C1C1E;
  --color-surface: #2C2C2E;
  --color-surface-2: #3A3A3C;
  --color-border: #3A3A3C;
  --color-border-subtle: #2C2C2E;

  --color-text: #F5F5F7;
  --color-text-secondary: #AEAEB2;
  --color-text-tertiary: #6C6C70;

  --color-primary-subtle: #3A2A00;
  --color-success-bg: #0A2A14;
  --color-warning-bg: #2A1E00;
  --color-error-bg: #2A0A08;

  --shadow-sm: 0 1px 3px rgba(0,0,0,.3), 0 1px 2px rgba(0,0,0,.2);
  --shadow-md: 0 4px 12px rgba(0,0,0,.4), 0 2px 4px rgba(0,0,0,.2);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.5;
  color: var(--color-text);
  background: var(--color-bg);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  transition: background var(--motion-base), color var(--motion-base);
}

/* Header */
.site-header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  max-width: 640px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-text {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.3px;
  color: var(--color-text);
}

/* Main layout */
.main {
  max-width: 640px;
  margin: 0 auto;
  padding: 32px 20px 48px;
  flex: 1;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-title { text-align: center; padding-bottom: 8px; }

.page-title h1 {
  font-size: 26px;
  font-weight: 600;
  letter-spacing: -0.5px;
  color: var(--color-text);
}

.subtitle {
  margin-top: 4px;
  color: var(--color-text-secondary);
  font-size: 14px;
}

/* Tabs */
.tab-bar {
  display: flex;
  gap: 4px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 4px;
}

.tab {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 12px;
  border: none;
  border-radius: calc(var(--radius-md) - 2px);
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--motion-fast), color var(--motion-fast);
  white-space: nowrap;
  font-family: var(--font-sans);
}

.tab:hover { color: var(--color-text); background: var(--color-border-subtle); }

.tab.active {
  background: var(--color-surface);
  color: var(--color-text);
  box-shadow: var(--shadow-sm);
}

/* Cards */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
}

/* Output card */
.output-card { display: flex; flex-direction: column; gap: 20px; }

.password-row {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  min-height: 64px;
}

.password-text {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  word-break: break-all;
  letter-spacing: 0.3px;
  line-height: 1.4;
}

/* Strength */
.strength-section { display: flex; flex-direction: column; gap: 6px; }

.strength-bar-track {
  height: 6px;
  background: var(--color-border);
  border-radius: 99px;
  overflow: hidden;
}

.strength-bar-fill {
  height: 100%;
  border-radius: 99px;
  width: 0;
  transition: width 300ms ease, background 300ms ease;
}

.strength-bar-fill[data-level="weak"]      { background: var(--color-error); }
.strength-bar-fill[data-level="fair"]      { background: var(--color-warning); }
.strength-bar-fill[data-level="strong"]    { background: var(--color-success); }
.strength-bar-fill[data-level="verystrong"]{ background: #007AFF; }

.strength-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.strength-label {
  font-size: 13px;
  font-weight: 600;
}

.strength-label[data-level="weak"]       { color: var(--color-error); }
.strength-label[data-level="fair"]       { color: var(--color-warning); }
.strength-label[data-level="strong"]     { color: var(--color-success); }
.strength-label[data-level="verystrong"] { color: #007AFF; }

.entropy-label {
  font-size: 12px;
  color: var(--color-text-tertiary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: none;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--motion-fast), transform var(--motion-fast), box-shadow var(--motion-fast);
  font-family: var(--font-sans);
}

.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover { background: var(--color-primary-hover); }

.btn-generate { width: 100%; padding: 12px 20px; font-size: 15px; font-weight: 600; }

.btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background var(--motion-fast), color var(--motion-fast), border-color var(--motion-fast);
  flex-shrink: 0;
}

.btn-icon:hover { color: var(--color-text); border-color: var(--color-primary); }

.copy-btn.copied {
  color: var(--color-success);
  border-color: var(--color-success);
  background: var(--color-success-bg);
}

/* Settings card */
.settings-card { padding: 20px 24px; }

.settings-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
}

.settings-grid { display: flex; flex-direction: column; gap: 20px; }

.setting-group { display: flex; flex-direction: column; gap: 8px; }

.setting-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
}

/* Button group (options) */
.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.btn-option {
  padding: 6px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface-2);
  color: var(--color-text-secondary);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background var(--motion-fast), color var(--motion-fast), border-color var(--motion-fast);
  font-family: var(--font-sans);
}

.btn-option:hover { color: var(--color-text); border-color: var(--color-primary); }

.btn-option.active {
  background: var(--color-primary-subtle);
  color: var(--color-primary);
  border-color: var(--color-primary);
  font-weight: 600;
}

/* Checkbox group */
.checkbox-group { display: flex; flex-direction: column; gap: 10px; }

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 14px;
  color: var(--color-text);
}

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

/* Range input */
.range-input {
  width: 100%;
  accent-color: var(--color-primary);
  cursor: pointer;
}

/* Footer */
.site-footer {
  text-align: center;
  padding: 16px 20px;
  font-size: 12px;
  color: var(--color-text-tertiary);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.site-footer a { color: var(--color-primary); text-decoration: none; }
.site-footer a:hover { text-decoration: underline; }
.footer-sep { opacity: 0.4; }

/* Responsive */
@media (max-width: 480px) {
  .main { padding: 24px 16px 40px; }
  .password-text { font-size: 15px; }
  .tab { font-size: 13px; padding: 7px 8px; }
  .tab svg { display: none; }
}