/* Modern Dark Theme Stylesheet */
/* Author: Hiva Mohammadzadeh */

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

:root {
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-card: #1f1f38;
    --bg-card-hover: #2a2a4a;
    --text-primary: #ffffff;
    --text-secondary: #b8b8b8;
    --text-muted: #888888;
    --accent-color: #f5c518;
    --accent-hover: #ffd700;
    --border-color: #2a2a4a;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: var(--accent-color);
    transition: color 0.3s ease;
}

a:hover {
    color: var(--accent-hover);
}

/* Container Layout */
.container {
    display: flex;
    min-height: 100vh;
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px;
    gap: 40px;
}

/* Sidebar Styles */
.sidebar {
    width: 320px;
    flex-shrink: 0;
    position: sticky;
    top: 40px;
    height: fit-content;
}

.sidebar-content {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    box-shadow: var(--shadow);
}

/* Profile Section */
.profile-section {
    margin-bottom: 30px;
}

.profile-image {
    width: 180px;
    height: 180px;
    margin: 0 auto 25px;
    border-radius: 20px;
    overflow: hidden;
    border: 3px solid var(--border-color);
}

.profile-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.name {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.title-badge {
    display: inline-block;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* Contact Info */
.contact-info {
    margin: 30px 0;
    padding: 25px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px 0;
    text-align: left;
}

.contact-icon {
    width: 40px;
    height: 40px;
    background: var(--bg-secondary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-color);
    font-size: 1rem;
}

.contact-text {
    display: flex;
    flex-direction: column;
}

.contact-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.contact-text span,
.contact-text a {
    font-size: 0.9rem;
    color: var(--text-primary);
}

.contact-text a:hover {
    color: var(--accent-color);
}

/* Social Links */
.social-links {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 20px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: var(--bg-secondary);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: var(--accent-color);
    color: var(--bg-primary);
    transform: translateY(-3px);
}

/* Main Content Styles */
.main-content {
    flex: 1;
    min-width: 0;
}

/* Navigation */
.nav-menu {
    background: var(--bg-card);
    border-radius: 15px;
    padding: 15px 25px;
    margin-bottom: 30px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-end;
    box-shadow: var(--shadow);
}

.nav-link {
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-secondary);
}

.nav-link.active {
    color: var(--accent-color);
}

/* Sections */
.section {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 40px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
}

.section-title {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 25px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 50px;
    height: 4px;
    background: var(--accent-color);
    border-radius: 2px;
}

/* About Content */
.about-content p {
    color: var(--text-secondary);
    margin-bottom: 15px;
    line-height: 1.8;
}

.about-content strong {
    color: var(--text-primary);
}

/* Research Grid */
.research-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.research-card {
    background: var(--bg-secondary);
    border-radius: 15px;
    padding: 25px;
    display: flex;
    gap: 20px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.research-card:hover {
    border-color: var(--border-color);
    transform: translateY(-5px);
}

.research-icon {
    width: 50px;
    height: 50px;
    background: var(--bg-card);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-color);
    font-size: 1.3rem;
    flex-shrink: 0;
}

.research-content h3 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.research-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Publications List */
.publications-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 20px;
}

.publication-item {
    display: flex;
    gap: 20px;
    padding: 25px;
    background: var(--bg-secondary);
    border-radius: 15px;
    transition: all 0.3s ease;
}

.publication-item:hover {
    transform: translateX(5px);
}

.publication-icon {
    width: 45px;
    height: 45px;
    background: var(--bg-card);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-color);
    font-size: 1.1rem;
    flex-shrink: 0;
}

.publication-content h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 8px;
    line-height: 1.4;
}

.publication-content h3 a {
    color: var(--text-primary);
}

.publication-content h3 a:hover {
    color: var(--accent-color);
}

.authors {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
    line-height: 1.5;
}

.authors strong {
    color: var(--accent-color);
}

.publication-venue {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-style: italic;
}

/* Experience Section */
.experience-category {
    margin-bottom: 35px;
}

.experience-category:last-child {
    margin-bottom: 0;
}

.category-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.category-title i {
    color: var(--accent-color);
    margin-right: 10px;
}

.experience-item {
    display: flex;
    gap: 25px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 12px;
    margin-bottom: 15px;
    transition: all 0.3s ease;
}

.experience-item:hover {
    transform: translateX(5px);
}

.experience-item:last-child {
    margin-bottom: 0;
}

.experience-date {
    min-width: 140px;
    font-size: 0.85rem;
    color: var(--accent-color);
    font-weight: 500;
}

.experience-content h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.experience-place {
    font-size: 0.9rem;
    color: var(--text-muted);
    display: block;
    margin-bottom: 10px;
}

.experience-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
    margin-top: 20px;
}

.skill-item {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.skill-name {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
}

.skill-bar {
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-color), var(--accent-hover));
    border-radius: 4px;
    transition: width 1s ease;
}

/* Awards Section */
.awards-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
}

.award-item {
    display: flex;
    gap: 20px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 12px;
    transition: all 0.3s ease;
    align-items: flex-start;
}

.award-item:hover {
    transform: translateX(5px);
    background: var(--bg-card-hover);
}

.award-icon {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.award-icon i {
    color: var(--bg-primary);
    font-size: 1.1rem;
}

.award-content {
    flex: 1;
}

.award-content h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.award-content p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.award-content p a {
    color: var(--accent-color);
}

.award-content p a:hover {
    color: var(--accent-hover);
    text-decoration: underline;
}

.award-date {
    font-size: 0.85rem;
    color: var(--accent-color);
    font-weight: 500;
}

/* Contact Section */
.contact-section {
    text-align: center;
}

.contact-section p {
    color: var(--text-secondary);
    margin-bottom: 25px;
    font-size: 1.1rem;
}

.contact-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    color: var(--bg-primary);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(245, 197, 24, 0.3);
}

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

.btn-secondary:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
    transform: translateY(-3px);
}

/* Footer */
.footer {
    text-align: center;
    padding: 20px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .container {
        padding: 30px;
        gap: 30px;
    }
    
    .sidebar {
        width: 280px;
    }
    
    .research-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 992px) {
    .container {
        flex-direction: column;
        padding: 20px;
    }
    
    .sidebar {
        width: 100%;
        position: relative;
        top: 0;
    }
    
    .nav-menu {
        justify-content: center;
    }
    
    .experience-item {
        flex-direction: column;
        gap: 10px;
    }
    
    .experience-date {
        min-width: auto;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .section {
        padding: 30px 20px;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .publication-item {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-menu {
        padding: 15px;
        gap: 5px;
    }
    
    .nav-link {
        padding: 8px 12px;
        font-size: 0.85rem;
    }
    
    .contact-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 15px;
    }
    
    .sidebar-content {
        padding: 30px 20px;
    }
    
    .profile-image {
        width: 140px;
        height: 140px;
    }
    
    .name {
        font-size: 1.3rem;
    }
    
    .contact-item {
        gap: 12px;
    }
    
    .section {
        padding: 25px 15px;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.section {
    animation: fadeInUp 0.6s ease forwards;
}

.section:nth-child(2) { animation-delay: 0.1s; }
.section:nth-child(3) { animation-delay: 0.2s; }
.section:nth-child(4) { animation-delay: 0.3s; }
.section:nth-child(5) { animation-delay: 0.4s; }
.section:nth-child(6) { animation-delay: 0.5s; }

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-card-hover);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-color);
}