/* CSS Variables for theming */
:root {
    /* Light theme */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --text-muted: #adb5bd;
    --border-color: #dee2e6;
    --border-focus: #007bff;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.15);
    
    /* Button colors */
    --btn-primary-bg: #007bff;
    --btn-primary-hover: #0056b3;
    --btn-secondary-bg: #6c757d;
    --btn-secondary-hover: #545b62;
    --btn-success-bg: #28a745;
    --btn-success-hover: #1e7e34;
    --btn-danger-bg: #dc3545;
    --btn-danger-hover: #c82333;
    
    /* Password strength colors */
    --strength-very-weak: #dc3545;
    --strength-weak: #fd7e14;
    --strength-medium: #ffc107;
    --strength-strong: #28a745;
    --strength-very-strong: #20c997;
    
    /* Modal colors */
    --modal-bg: rgba(0, 0, 0, 0.5);
    --modal-content-bg: #ffffff;
    
    /* Notification colors */
    --notification-success: #28a745;
    --notification-error: #dc3545;
}

[data-theme="dark"] {
    /* Dark theme */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #404040;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;
    --border-color: #404040;
    --border-focus: #007bff;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.4);
    
    /* Button colors for dark theme */
    --btn-primary-bg: #007bff;
    --btn-primary-hover: #0056b3;
    --btn-secondary-bg: #6c757d;
    --btn-secondary-hover: #545b62;
    --btn-success-bg: #28a745;
    --btn-success-hover: #1e7e34;
    --btn-danger-bg: #dc3545;
    --btn-danger-hover: #c82333;
    
    /* Password strength colors for dark theme */
    --strength-very-weak: #ff6b6b;
    --strength-weak: #ffa726;
    --strength-medium: #ffd54f;
    --strength-strong: #66bb6a;
    --strength-very-strong: #4db6ac;
    
    /* Modal colors for dark theme */
    --modal-bg: rgba(0, 0, 0, 0.7);
    --modal-content-bg: #2d2d2d;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: all 0.3s ease;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px 0;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.header p {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

/* Main Content */
.main-content {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

/* Password Section */
.password-section {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.password-display {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

#passwordOutput {
    flex: 1;
    padding: 15px;
    font-size: 1.1rem;
    font-family: 'Courier New', monospace;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.3s ease;
}

#passwordOutput:focus {
    border-color: var(--border-focus);
}

.password-strength {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
}

.strength-bar {
    flex: 1;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.strength-fill {
    height: 100%;
    width: 0%;
    transition: all 0.3s ease;
    border-radius: 4px;
}

.strength-fill.very-weak { width: 20%; background: var(--strength-very-weak); }
.strength-fill.weak { width: 40%; background: var(--strength-weak); }
.strength-fill.medium { width: 60%; background: var(--strength-medium); }
.strength-fill.strong { width: 80%; background: var(--strength-strong); }
.strength-fill.very-strong { width: 100%; background: var(--strength-very-strong); }

#strengthText {
    font-weight: 600;
    min-width: 120px;
    text-align: right;
}

/* Cracking Time Display */
.cracking-time {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
}

.cracking-info {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.combinations {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
    text-align: center;
    padding: 8px;
    background: var(--bg-tertiary);
    border-radius: 6px;
}

.cracking-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 8px;
}

.method {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.method:hover {
    border-color: var(--border-focus);
    box-shadow: var(--shadow);
}

.method-name {
    color: var(--text-primary);
    font-weight: 500;
}

.method-time {
    color: var(--text-secondary);
    font-weight: 600;
    font-family: 'Courier New', monospace;
}

/* Configuration Panel */
.config-panel {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.config-section {
    margin-bottom: 25px;
}

.config-section:last-child {
    margin-bottom: 0;
}

.config-section h3 {
    margin-bottom: 15px;
    color: var(--text-primary);
    font-size: 1.2rem;
}

/* Length Control */
.length-control {
    display: flex;
    align-items: center;
    gap: 15px;
}

#lengthSlider {
    flex: 1;
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    outline: none;
    -webkit-appearance: none;
}

#lengthSlider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--btn-primary-bg);
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
}

#lengthSlider::-webkit-slider-thumb:hover {
    background: var(--btn-primary-hover);
    transform: scale(1.1);
}

#lengthValue {
    font-weight: 600;
    font-size: 1.1rem;
    min-width: 40px;
    text-align: center;
}

/* Checkbox Groups */
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    padding: 8px 0;
    transition: all 0.3s ease;
}

.checkbox-item:hover {
    background: var(--bg-tertiary);
    border-radius: 6px;
    padding: 8px 12px;
    margin: 0 -12px;
}

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

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    position: relative;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

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

.checkbox-item input[type="checkbox"]:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 12px;
    font-weight: bold;
}

.label-text {
    flex: 1;
    color: var(--text-primary);
}

/* Custom Characters */
.custom-chars {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

#customChars {
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.3s ease;
}

#customChars:focus {
    border-color: var(--border-focus);
}

.custom-chars small {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

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

.btn-primary:hover {
    background: var(--btn-primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-secondary {
    background: var(--btn-secondary-bg);
    color: white;
}

.btn-secondary:hover {
    background: var(--btn-secondary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.btn-large {
    padding: 15px 30px;
    font-size: 1.1rem;
}

.btn-small {
    padding: 8px 16px;
    font-size: 0.9rem;
}

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

.btn-template:hover {
    background: var(--border-color);
    transform: translateY(-1px);
}

/* Password History */
.password-history {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.password-history h3 {
    margin-bottom: 15px;
    color: var(--text-primary);
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 15px;
    max-height: 200px;
    overflow-y: auto;
}

.history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background: var(--bg-primary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.history-item:hover {
    border-color: var(--border-focus);
    box-shadow: var(--shadow);
}

.history-password {
    font-family: 'Courier New', monospace;
    color: var(--text-primary);
    flex: 1;
    margin-right: 15px;
}

.history-actions {
    display: flex;
    gap: 8px;
}

.btn-copy-history {
    padding: 6px 12px;
    font-size: 0.8rem;
    background: var(--btn-success-bg);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-copy-history:hover {
    background: var(--btn-success-hover);
}

/* Password Templates */
.password-templates {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 25px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.password-templates h3 {
    margin-bottom: 15px;
    color: var(--text-primary);
}

.template-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--modal-bg);
    z-index: 1000;
    backdrop-filter: blur(5px);
}

.modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--modal-content-bg);
    border-radius: 12px;
    box-shadow: var(--shadow-hover);
    max-width: 600px;
    width: 90%;
    max-height: 80vh;
    overflow: hidden;
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.9);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    color: var(--text-primary);
    margin: 0;
}

.btn-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s ease;
}

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

.modal-body {
    padding: 25px;
    max-height: 400px;
    overflow-y: auto;
}

.modal-footer {
    display: flex;
    gap: 15px;
    justify-content: flex-end;
    padding: 20px 25px;
    border-top: 1px solid var(--border-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-weight: 600;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
    border-color: var(--border-focus);
}

.multiple-passwords {
    margin-top: 20px;
    max-height: 200px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    background: var(--bg-primary);
}

.multiple-password-item {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    font-family: 'Courier New', monospace;
    color: var(--text-primary);
}

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

/* Notification */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 20px;
    border-radius: 8px;
    color: white;
    font-weight: 600;
    z-index: 1001;
    transform: translateX(400px);
    transition: transform 0.3s ease;
}

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

.notification.success {
    background: var(--notification-success);
}

.notification.error {
    background: var(--notification-error);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .password-display {
        flex-direction: column;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .template-buttons {
        grid-template-columns: 1fr;
    }
    
    .cracking-methods {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        width: 95%;
        margin: 20px;
    }
    
    .modal-footer {
        flex-direction: column;
    }
}

/* Scrollbar Styling */
.history-list::-webkit-scrollbar,
.multiple-passwords::-webkit-scrollbar,
.modal-body::-webkit-scrollbar {
    width: 8px;
}

.history-list::-webkit-scrollbar-track,
.multiple-passwords::-webkit-scrollbar-track,
.modal-body::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

.history-list::-webkit-scrollbar-thumb,
.multiple-passwords::-webkit-scrollbar-thumb,
.modal-body::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.history-list::-webkit-scrollbar-thumb:hover,
.multiple-passwords::-webkit-scrollbar-thumb:hover,
.modal-body::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}