/* ==========================================================================
   Ahmed Eldaw Mohamed - Landing Page
   Minimal Professional Design
   ========================================================================== */

/* Variables */
:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --background-light: #f8fafc;
    --background-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --border-radius: 0.5rem;
    --transition: all 0.3s ease;
}

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

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

/* Landing Container */
.landing-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.content-wrapper {
    display: flex;
    flex: 1;
    gap: 4rem;
    align-items: center;
}

/* Left Section - Photo and Basic Info */
.left-section {
    flex: 0 0 300px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.profile-photo {
    margin-bottom: 1.5rem;
}

.profile-img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--primary-color);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.profile-img:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.profile-info .name {
    font-family: 'Playfair Display', serif;
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.profile-info .title {
    font-size: 1.125rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1rem;
}

.profile-info .location {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.profile-info .location i {
    color: var(--primary-color);
}

/* Right Section - Navigation and Summary */
.right-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Navigation */
.main-navigation {
    margin-bottom: 1rem;
}

.nav-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 0;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 1.125rem;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: 2px solid transparent;
}

.nav-link:hover {
    color: var(--primary-color);
    background-color: var(--background-light);
    border-color: var(--primary-color);
    text-decoration: none;
    transform: translateY(-2px);
}

/* Summary Section */
.summary-section h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.interests-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.interest-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    background-color: var(--background-light);
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.interest-item:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.interest-item i {
    color: var(--primary-color);
    font-size: 1.125rem;
    transition: var(--transition);
}

.interest-item:hover i {
    color: white;
}

.interest-item span {
    font-weight: 500;
    font-size: 0.875rem;
}

.brief-summary {
    margin-bottom: 2rem;
}

.brief-summary p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0;
}

/* Quick Actions */
.quick-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: 2px solid;
    text-align: center;
    cursor: pointer;
}

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

.btn-primary:hover {
    background-color: var(--secondary-color);
    border-color: var(--secondary-color);
    color: white;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Social Section */
.social-section h4 {
    font-family: 'Playfair Display', serif;
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.social-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.social-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background-color: var(--background-light);
    color: var(--text-secondary);
    border-radius: var(--border-radius);
    text-decoration: none;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    font-weight: 500;
    font-size: 0.875rem;
}

.social-link:hover {
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.social-link.github:hover {
    background-color: #333;
    color: white;
    border-color: #333;
}

.social-link.linkedin:hover {
    background-color: #0077b5;
    color: white;
    border-color: #0077b5;
}

.social-link.twitter:hover {
    background-color: #1da1f2;
    color: white;
    border-color: #1da1f2;
}

.social-link.researchgate:hover {
    background-color: #00d4aa;
    color: white;
    border-color: #00d4aa;
}

.social-link i {
    font-size: 1rem;
}

/* Footer */
.landing-footer {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.landing-footer p {
    color: var(--text-light);
    font-size: 0.875rem;
    margin: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .landing-container {
        padding: 1rem;
    }
    
    .content-wrapper {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }
    
    .left-section {
        flex: none;
        width: 100%;
    }
    
    .profile-img {
        width: 100px;
        height: 100px;
    }
    
    .profile-info .name {
        font-size: 1.5rem;
    }
    
    .nav-list {
        justify-content: center;
        gap: 1rem;
    }
    
    .nav-link {
        font-size: 1rem;
        padding: 0.5rem 0.75rem;
    }
    
    .interests-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 0.75rem;
    }
    
    .interest-item {
        padding: 0.5rem 0.75rem;
        justify-content: center;
    }
    
    .quick-actions {
        justify-content: center;
    }
    
    .social-links {
        justify-content: center;
    }
}

@media (max-width: 576px) {
    .nav-list {
        flex-direction: column;
        align-items: center;
    }
    
    .nav-link {
        width: 200px;
        text-align: center;
    }
    
    .quick-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 200px;
        justify-content: center;
    }
    
    .interests-grid {
        grid-template-columns: 1fr;
    }
    
    .social-links {
        flex-direction: column;
        align-items: center;
    }
    
    .social-link {
        width: 200px;
        justify-content: center;
    }
}

/* Animations */
.profile-img,
.nav-link,
.interest-item,
.btn,
.social-link {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Loading state */
body {
    opacity: 0;
    transition: opacity 0.3s ease;
}

body.loaded {
    opacity: 1;
}

/* Print styles */
@media print {
    .landing-container {
        padding: 1rem;
    }
    
    .content-wrapper {
        flex-direction: column;
    }
    
    .quick-actions,
    .social-links {
        display: none;
    }
}