/* ===== ABOUT PAGE SPECIFIC STYLES ===== */
/* This file ONLY contains styles unique to the about.html page */

/* ===== HERO SECTION (Match home page) ===== */
.upload-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.upload-header h2 {
    font-size: var(--font-size-3xl);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
}

.upload-header h2 i {
    color: var(--error-color);
}

.subtitle {
    color: var(--text-muted);
    font-size: var(--font-size-lg);
}

/* ===== UPLOAD AREA (Home Page Specific) ===== */
.upload-area {
    border-color: var(--primary-color);
}

.upload-area:hover {
    background: var(--primary-light);
    border-color: var(--primary-dark);
}

.upload-area.dragover {
    background: var(--primary-light);
    border-color: var(--primary-dark);
}

.upload-icon {
    color: var(--primary-color);
}

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

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

/* ===== MERGE NOTE ===== */
.merge-note {
    text-align: center;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-lg);
}

.merge-note i {
    margin-right: var(--spacing-xs);
    color: var(--primary-color);
}

/* ===== ABOUT CONTENT ===== */
.about-content {
    margin-top: var(--spacing-xxl);
}

.about-section {
    margin-bottom: var(--spacing-xxl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid var(--border-color);
}

.about-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.content-box {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.content-box p {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
    color: var(--text-secondary);
}

.content-box p:last-child {
    margin-bottom: 0;
}

/* ===== FEATURES GRID ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.feature-card {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.feature-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--error-color), var(--error-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
}

.feature-icon i {
    font-size: var(--font-size-2xl);
    color: white;
}

.feature-card h4 {
    font-size: var(--font-size-xl);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-md);
}

.feature-card p {
    color: var(--text-muted);
    font-size: var(--font-size-base);
    line-height: 1.6;
}

/* ===== HOW IT WORKS STEPS ===== */
.steps-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    max-width: 600px;
    margin: var(--spacing-xl) auto;
}

.step {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    transition: transform var(--transition-normal);
}

.step:hover {
    transform: translateX(5px);
    background: var(--primary-light);
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--error-color), var(--error-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: white;
    flex-shrink: 0;
}

.step-content h4 {
    font-size: var(--font-size-xl);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-sm);
}

.step-content p {
    color: var(--text-muted);
    line-height: 1.6;
}

/* ===== SECURITY SECTION ===== */
.security-content {
    margin-top: var(--spacing-xl);
}

.security-points {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.security-point {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-normal);
}

.security-point:hover {
    background: var(--primary-light);
}

.security-point i {
    color: var(--success-color);
    font-size: var(--font-size-lg);
}

.security-point span {
    color: var(--text-secondary);
    font-weight: var(--font-weight-medium);
}

.security-note {
    background: linear-gradient(135deg, #fff8e1, #ffecb3);
    border-left: 4px solid var(--warning-color);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius-sm);
}

.security-note p {
    color: var(--gray-800);
    line-height: 1.6;
}

.security-note strong {
    color: var(--warning-dark);
}

/* ===== CTA SECTION ===== */
.cta-section {
    margin-top: var(--spacing-xxl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.cta-section .action-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    flex-wrap: wrap;
}

.cta-section .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-lg) var(--spacing-xxl);
    border-radius: var(--border-radius-xs);
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    transition: all var(--transition-normal);
    min-width: 180px;
}

/* ===== TOAST NOTIFICATIONS (Copy from home page) ===== */
.toast-container {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: var(--z-toast);
}

.toast {
    background: var(--bg-primary);
    border-radius: var(--border-radius-xs);
    padding: var(--spacing-lg);
    margin-top: var(--spacing-sm);
    box-shadow: var(--shadow-xl);
    min-width: 300px;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    animation: slideIn 0.3s ease;
    border-left: 4px solid var(--primary-color);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

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

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

.toast.error {
    border-left-color: var(--error-color);
}

.toast.warning {
    border-left-color: var(--warning-color);
}

.toast-info {
    flex: 1;
}

.toast-title {
    font-weight: var(--font-weight-semibold);
    color: var(--secondary-color);
    margin-bottom: var(--spacing-xs);
}

.toast-message {
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .steps-container {
        max-width: 100%;
    }
    
    .step {
        flex-direction: column;
        text-align: center;
        align-items: center;
    }
    
    .security-points {
        grid-template-columns: 1fr;
    }
    
    .cta-section .action-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-section .btn-primary {
        width: 100%;
        max-width: 300px;
    }
}

@media (max-width: 480px) {
    .step-number {
        width: 40px;
        height: 40px;
        font-size: var(--font-size-lg);
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
    }
}

/* ===== DARK MODE ===== */
@media (prefers-color-scheme: dark) {
    .feature-card {
        background: var(--bg-tertiary);
    }
    
    .step {
        background: var(--bg-tertiary);
    }
    
    .step:hover {
        background: rgba(52, 152, 219, 0.1);
    }
    
    .security-point {
        background: var(--bg-tertiary);
    }
    
    .security-point:hover {
        background: rgba(52, 152, 219, 0.1);
    }
    
    .security-note {
        background: linear-gradient(135deg, #3e2723, #5d4037);
        border-left-color: var(--warning-color);
    }
    
    .security-note p {
        color: var(--gray-300);
    }
    
    .security-note strong {
        color: #ffcc80;
    }
}