/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Light Theme Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
    
    /* Accent Colors */
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --secondary-color: #6366f1;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    
    /* Strength Colors */
    --strength-weak: #ef4444;
    --strength-fair: #f59e0b;
    --strength-good: #10b981;
    --strength-strong: #059669;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: all 0.15s ease;
    --transition-normal: all 0.25s ease;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Font Sizes */
    --text-xs: 0.75rem;
    --text-sm: 0.875rem;
    --text-base: 1rem;
    --text-lg: 1.125rem;
    --text-xl: 1.25rem;
    --text-2xl: 1.5rem;
    --text-3xl: 1.875rem;
    --text-4xl: 2.25rem;
}

/* Dark Theme */
.dark-theme {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-color: #334155;
    --border-hover: #475569;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition-normal);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.header {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--primary-color);
}

.logo i {
    font-size: var(--text-2xl);
}

.header-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Main Content */
.main {
    flex: 1;
    padding: var(--spacing-2xl) 0;
}

/* Hero Section */
.hero {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.hero-title {
    font-size: var(--text-4xl);
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Generator Section */
.generator-section {
    max-width: 800px;
    margin: 0 auto var(--spacing-2xl);
}

/* Password Display */
.password-display {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.password-field {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.password-input {
    flex: 1;
    padding: var(--spacing-lg);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: var(--text-lg);
    font-family: 'Courier New', monospace;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: var(--transition-fast);
    letter-spacing: 0.05em;
}

.password-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

.password-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Strength Indicator */
.strength-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.strength-bar {
    flex: 1;
    height: 8px;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.strength-fill {
    height: 100%;
    width: 0%;
    border-radius: var(--radius-sm);
    transition: var(--transition-normal);
    background-color: var(--text-muted);
}

.strength-fill.weak {
    background-color: var(--strength-weak);
}

.strength-fill.fair {
    background-color: var(--warning-color);
}

.strength-fill.good {
    background-color: var(--success-color);
}

.strength-fill.strong {
    background-color: var(--strength-strong);
}

.strength-text {
    font-size: var(--text-sm);
    font-weight: 600;
    min-width: 120px;
    text-align: right;
}

/* Configuration Panel */
.config-panel {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.config-grid {
    display: grid;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.config-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.config-label {
    font-size: var(--text-sm);
    font-weight: 600;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Length Control */
.length-control {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.length-slider {
    flex: 1;
    height: 6px;
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    outline: none;
    -webkit-appearance: none;
}

.length-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid var(--bg-primary);
    box-shadow: var(--shadow-sm);
}

.length-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: 2px solid var(--bg-primary);
    box-shadow: var(--shadow-sm);
}

.length-input {
    width: 80px;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    text-align: center;
    font-weight: 600;
}

/* Checkbox Group */
.checkbox-group {
    display: grid;
    gap: var(--spacing-md);
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: var(--transition-fast);
}

.checkbox-item:hover {
    background-color: var(--bg-tertiary);
}

.checkbox-item input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    position: relative;
}

.checkbox-item input[type="checkbox"]:checked + .checkmark {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-item input[type="checkbox"]:checked + .checkmark::after {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    color: white;
    font-size: var(--text-xs);
}

/* Batch Control */
.batch-control {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
}

.batch-input {
    width: 100px;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    text-align: center;
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background-color: var(--border-hover);
    border-color: var(--border-hover);
}

.btn-icon {
    width: 44px;
    height: 44px;
    padding: 0;
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-icon:hover:not(:disabled) {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.btn-icon:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#generatePassword {
    width: 100%;
    padding: var(--spacing-lg);
    font-size: var(--text-lg);
    border-radius: var(--radius-lg);
    background-color: var(--success-color);
    color: white;
}

#generatePassword:hover:not(:disabled) {
    background-color: var(--strength-strong);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Analysis Section */
.analysis-section {
    max-width: 800px;
    margin: 0 auto;
}

.analysis-card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.analysis-title {
    font-size: var(--text-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
}

.analysis-content {
    color: var(--text-secondary);
}

.analysis-placeholder {
    text-align: center;
    font-style: italic;
    color: var(--text-muted);
}

.analysis-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-color);
}

.analysis-item:last-child {
    border-bottom: none;
}

.analysis-value {
    font-weight: 600;
}

.analysis-value.good {
    color: var(--success-color);
}

.analysis-value.warning {
    color: var(--warning-color);
}

.analysis-value.danger {
    color: var(--danger-color);
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
    animation: modalFadeIn 0.3s ease;
}

.modal-content {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    animation: modalSlideIn 0.3s ease;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: var(--text-xl);
    font-weight: 700;
}

.modal-close {
    background: none;
    border: none;
    font-size: var(--text-2xl);
    cursor: pointer;
    color: var(--text-muted);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.modal-close:hover {
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
}

.modal-body {
    flex: 1;
    padding: var(--spacing-xl);
    overflow-y: auto;
}

.modal-footer {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-top: 1px solid var(--border-color);
}

/* History List */
.history-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.history-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.history-password {
    flex: 1;
    font-family: 'Courier New', monospace;
    font-size: var(--text-sm);
    color: var(--text-primary);
    word-break: break-all;
}

.history-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.history-empty {
    text-align: center;
    color: var(--text-muted);
    font-style: italic;
    padding: var(--spacing-xl);
}

/* Batch Results */
.batch-results {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.batch-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.batch-password {
    flex: 1;
    font-family: 'Courier New', monospace;
    font-size: var(--text-sm);
    color: var(--text-primary);
    word-break: break-all;
}

/* Footer */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-xl) 0;
    margin-top: auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-info p {
    color: var(--text-secondary);
    font-size: var(--text-sm);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--text-sm);
    transition: var(--transition-fast);
}

.footer-link:hover {
    color: var(--primary-color);
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    box-shadow: var(--shadow-lg);
    transform: translateX(400px);
    transition: var(--transition-normal);
    z-index: 1001;
    max-width: 300px;
}

.toast.show {
    transform: translateX(0);
}

.toast.success {
    background-color: var(--success-color);
    color: white;
    border-color: var(--success-color);
}

.toast.error {
    background-color: var(--danger-color);
    color: white;
    border-color: var(--danger-color);
}

/* Animations */
@keyframes modalFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .hero-title {
        font-size: var(--text-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--text-base);
    }
    
    .password-field {
        flex-direction: column;
    }
    
    .password-actions {
        justify-content: center;
    }
    
    .config-grid {
        gap: var(--spacing-lg);
    }
    
    .length-control {
        flex-direction: column;
        align-items: stretch;
    }
    
    .length-input {
        width: 100%;
    }
    
    .batch-control {
        flex-direction: column;
        align-items: stretch;
    }
    
    .batch-input {
        width: 100%;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    
    .modal-content {
        width: 95%;
        margin: var(--spacing-md);
    }
    
    .modal-footer {
        flex-direction: column;
    }
    
    .toast {
        right: var(--spacing-sm);
        left: var(--spacing-sm);
        max-width: none;
    }
}

@media (max-width: 480px) {
    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .password-display,
    .config-panel,
    .analysis-card {
        padding: var(--spacing-md);
    }
    
    .checkbox-group {
        gap: var(--spacing-sm);
    }
    
    .checkbox-item {
        padding: var(--spacing-xs);
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .modal,
    .toast {
        display: none !important;
    }
    
    .main {
        padding: 0;
    }
    
    .password-display,
    .config-panel,
    .analysis-card {
        box-shadow: none;
        border: 1px solid #ccc;
    }
}