:root {
    --primary-color: #B6794F;
    --secondary-color: #E0A17D;
    --accent-color: #5F3620;
    --background-color: #171717;
    --surface-color: #262626;
    --text-color: #FFFFFF;
    --text-secondary: #A3A3A3;
    --border-color: #2F2F2F;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --radius: 16px;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: linear-gradient(135deg, #171717 0%, #262626 100%);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 800px;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.header {
    text-align: center;
    padding: 20px;
}

.header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.main-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 30px;
}

.generator-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.password-display {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    position: relative;
    min-height: 80px;
}

.password-output {
    font-family: 'Courier New', monospace;
    font-size: 1.5rem;
    letter-spacing: 2px;
    color: var(--primary-color);
    word-break: break-all;
    min-height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    transition: all 0.3s ease;
}

.password-actions {
    display: flex;
    gap: 10px;
    margin-top: 15px;
    justify-content: center;
}

.action-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    font-weight: 500;
}

.action-btn:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.action-btn:active {
    transform: translateY(0);
}

.copy-btn {
    background: rgba(16, 185, 129, 0.1);
    border-color: rgba(16, 185, 129, 0.3);
}

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

.regenerate-btn {
    background: rgba(95, 54, 32, 0.1);
    border-color: rgba(95, 54, 32, 0.3);
}

.regenerate-btn:hover {
    background: var(--accent-color);
    border-color: var(--accent-color);
}

.strength-indicator {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.strength-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.strength-bar {
    height: 8px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.strength-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--error-color), var(--warning-color), var(--success-color));
    transition: width 0.5s ease, background-color 0.5s ease;
}

.strength-text {
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
}

.options-section {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.options-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.option-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.slider {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    outline: none;
    border: 1px solid var(--border-color);
    cursor: pointer;
}

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

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

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 12px;
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--text-color);
    user-select: none;
}

.checkbox-custom {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    position: relative;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.05);
}

.checkbox-label input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

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

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

.generate-section {
    display: flex;
    justify-content: center;
    margin-top: 10px;
}

.generate-btn {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    color: white;
    padding: 15px 40px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(182, 121, 79, 0.3);
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(182, 121, 79, 0.4);
}

.generate-btn:active {
    transform: translateY(0);
}

.password-stats {
    display: flex;
    justify-content: space-around;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 15px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.stat-value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-color);
}

.features-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 30px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.features-card h3 {
    color: var(--primary-color);
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.features-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.features-list li {
    color: var(--text-secondary);
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 20px;
}

.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(16, 185, 129, 0.9);
    color: white;
    padding: 12px 24px;
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    transition: transform 0.3s ease;
    pointer-events: none;
    opacity: 0;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
    pointer-events: auto;
}

/* Responsive Design */
@media (max-width: 768px) {
    .main-content {
        grid-template-columns: 1fr;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .password-output {
        font-size: 1.2rem;
        letter-spacing: 1px;
    }
    
    .password-actions {
        flex-direction: column;
    }
    
    .password-stats {
        flex-direction: column;
        gap: 10px;
    }
}