/* Tailwind CSS CDN */
@import url('https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css');

/* Custom CSS Variables */
:root {
    /* Colors */
    --primary-color: #667eea;
    --primary-dark: #764ba2;
    --secondary-color: #4299e1;
    --background-light: #ffffff;
    --background-gray: #f7fafc;
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-light: #ffffff;
    
    /* Typography */
    --font-family: 'PingFang SC', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --heading-size: 48px;
    --subheading-size: 24px;
    --body-size: 16px;
    
    /* Spacing */
    --section-padding: 80px 0;
    --container-max-width: 1200px;
    
    /* Animation */
    --transition-speed: 0.3s;
    --fade-duration: 0.8s;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--body-size);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-light);
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all var(--transition-speed) ease;
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-speed) ease;
}

.nav-logo:hover {
    color: var(--primary-dark);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 40px;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    position: relative;
    transition: color var(--transition-speed) ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    transition: width var(--transition-speed) ease;
}

.nav-link:hover {
    color: var(--primary-color);
}

.nav-link:hover::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    background: none;
    border: none;
}

.hamburger {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    margin: 3px 0;
    transition: 0.3s;
}

/* ============================================
   Hero Section - Split Layout
   ============================================ */

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

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

@keyframes pulseGlow {
    0%, 100% { box-shadow: 0 0 20px rgba(102, 126, 234, 0.4); }
    50% { box-shadow: 0 0 40px rgba(102, 126, 234, 0.7); }
}

.hero.hero-split {
    display: flex;
    min-height: calc(100vh - 70px);
    margin-top: 70px; /* offset fixed navbar */
    overflow: visible;
}

/* ----- Left Sidebar ----- */
.hero-sidebar {
    position: sticky;
    top: 70px;
    width: 300px;
    flex-shrink: 0;
    height: calc(100vh - 70px);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.hero-sidebar-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(160deg, #667eea 0%, #764ba2 55%, #4299e1 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    z-index: 0;
}

.gradient-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.08);
}

.hero-sidebar-inner {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 40px 24px 32px;
    height: 100%;
    overflow-y: auto;
    scrollbar-width: none;
}

.hero-sidebar-inner::-webkit-scrollbar {
    display: none;
}

/* Profile Image */
.profile-image {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid rgba(255, 255, 255, 0.5);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    margin-bottom: 20px;
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
    animation: pulseGlow 4s ease infinite;
}

.profile-image:hover {
    transform: scale(1.06);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

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

/* Name & Title */
.hero-title {
    font-size: 28px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 6px;
    text-align: center;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
    letter-spacing: 0.5px;
}

.hero-subtitle {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.92);
    margin-bottom: 3px;
    font-weight: 600;
    text-align: center;
    background: rgba(255, 255, 255, 0.15);
    padding: 4px 14px;
    border-radius: 20px;
    backdrop-filter: blur(8px);
}

.hero-institution {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 14px;
    text-align: center;
    font-weight: 500;
}

/* Typing Effect */
.typing-container {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 18px;
    min-height: 22px;
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    padding: 6px 14px;
    border-radius: 8px;
    width: 100%;
    backdrop-filter: blur(4px);
}

.typing-text {
    display: inline;
}

.typing-cursor {
    display: inline-block;
    animation: blink 1s infinite;
}

/* Sidebar Info Items */
.hero-info {
    width: 100%;
    margin-bottom: 16px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.hero-affiliation,
.hero-supervisor,
.hero-location {
    font-size: 12.5px;
    color: rgba(255, 255, 255, 0.82);
    text-align: left;
    line-height: 1.5;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.sidebar-info-icon {
    flex-shrink: 0;
    margin-top: 2px;
    opacity: 0.8;
    font-size: 11px;
}

/* Divider */
.sidebar-divider {
    width: 60%;
    height: 1px;
    background: rgba(255, 255, 255, 0.25);
    margin: 12px 0;
}

/* Social Links */
.social-links {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.18);
    color: #ffffff;
    text-decoration: none;
    font-size: 15px;
    transition: all var(--transition-speed) ease;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.social-link:hover {
    background: rgba(255, 255, 255, 0.35);
    transform: translateY(-4px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}

/* Sidebar Stats */
.sidebar-stats {
    display: flex;
    gap: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.12);
    border-radius: 12px;
    overflow: hidden;
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.stat-item {
    flex: 1;
    padding: 12px 6px;
    text-align: center;
    border-right: 1px solid rgba(255, 255, 255, 0.15);
    transition: background var(--transition-speed) ease;
}

.stat-item:last-child {
    border-right: none;
}

.stat-item:hover {
    background: rgba(255, 255, 255, 0.1);
}

.stat-number {
    display: block;
    font-size: 20px;
    font-weight: 700;
    color: #ffffff;
    line-height: 1.2;
}

.stat-label {
    display: block;
    font-size: 10px;
    color: rgba(255, 255, 255, 0.75);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 2px;
}

/* ----- Right Main Content ----- */
.hero-main {
    flex: 1;
    background: #f8fafc;
    padding: 40px 44px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 36px;
    min-height: calc(100vh - 70px);
}

/* Module Container */
.hero-module {
    background: #ffffff;
    border-radius: 16px;
    padding: 28px 32px;
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
    transition: box-shadow var(--transition-speed) ease;
    animation: fadeSlideUp 0.6s ease both;
}

.hero-module:nth-child(2) { animation-delay: 0.1s; }
.hero-module:nth-child(3) { animation-delay: 0.2s; }

.hero-module:hover {
    box-shadow: 0 6px 28px rgba(102, 126, 234, 0.12);
}

/* Module Header */
.hero-module-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 22px;
    padding-bottom: 16px;
    border-bottom: 2px solid #f0f4ff;
}

.hero-module-icon {
    font-size: 18px;
    color: var(--primary-color);
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.12), rgba(118, 75, 162, 0.12));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.hero-module-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    flex: 1;
}

.hero-module-more {
    font-size: 13px;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    border-radius: 20px;
    background: rgba(102, 126, 234, 0.08);
    transition: all var(--transition-speed) ease;
    white-space: nowrap;
}

.hero-module-more:hover {
    background: var(--primary-color);
    color: #ffffff;
    transform: translateX(3px);
}

/* ----- News Items in Hero ----- */
.hero-news-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.hero-news-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 16px 18px;
    border-radius: 12px;
    background: #fafbff;
    border: 1px solid #eef0ff;
    transition: all var(--transition-speed) ease;
    position: relative;
}

.hero-news-item:hover {
    background: #f0f4ff;
    border-color: rgba(102, 126, 234, 0.3);
    transform: translateX(4px);
    box-shadow: 0 3px 12px rgba(102, 126, 234, 0.1);
}

.hero-news-badge {
    position: absolute;
    top: -8px;
    right: 14px;
    font-size: 10px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 10px;
    letter-spacing: 0.5px;
}

.hero-news-badge--new {
    background: linear-gradient(135deg, #ed8936, #dd6b20);
    color: #fff;
}

.hero-news-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 54px;
    padding: 8px 6px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 10px;
    color: #fff;
    flex-shrink: 0;
}

.hero-news-month {
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.hero-news-year {
    font-size: 16px;
    font-weight: 700;
    line-height: 1.2;
}

.hero-news-content h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
    line-height: 1.4;
}

.hero-news-content p {
    font-size: 13.5px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 8px;
}

.hero-news-tag {
    display: inline-block;
    font-size: 11px;
    font-weight: 600;
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.1);
    padding: 2px 10px;
    border-radius: 12px;
    letter-spacing: 0.3px;
}

/* ----- Featured Publications in Hero ----- */
.hero-pub-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.hero-pub-card {
    padding: 18px 20px;
    border-radius: 12px;
    border: 1px solid #eef0ff;
    background: #fafbff;
    transition: all var(--transition-speed) ease;
}

.hero-pub-card:hover {
    background: #f0f4ff;
    border-color: rgba(102, 126, 234, 0.3);
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.12);
}

.hero-pub-card--highlight {
    border-left: 4px solid #48bb78;
    background: #f0fff4;
    border-color: #c6f6d5;
}

.hero-pub-card--highlight:hover {
    background: #e6ffed;
    border-left-color: #38a169;
}

.hero-pub-status {
    display: inline-block;
    font-size: 11.5px;
    font-weight: 700;
    padding: 3px 10px;
    border-radius: 12px;
    margin-bottom: 8px;
    letter-spacing: 0.3px;
}

.hero-pub-status--accepted {
    background: linear-gradient(135deg, #48bb78, #38a169);
    color: #fff;
}

.hero-pub-status--submitted {
    background: linear-gradient(135deg, #ed8936, #dd6b20);
    color: #fff;
}

.hero-pub-status--published {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: #fff;
}

.hero-pub-title {
    font-size: 14.5px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
    line-height: 1.45;
}

.hero-pub-authors {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 10px;
    line-height: 1.5;
}

.hero-pub-links {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.hero-pub-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 12.5px;
    font-weight: 500;
    text-decoration: none;
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
    transition: all var(--transition-speed) ease;
    border: 1px solid rgba(102, 126, 234, 0.2);
}

.hero-pub-link:hover {
    background: var(--primary-color);
    color: #ffffff;
    border-color: var(--primary-color);
}

.hero-pub-link--disabled {
    color: var(--text-secondary);
    background: rgba(0, 0, 0, 0.04);
    border-color: rgba(0, 0, 0, 0.1);
    cursor: not-allowed;
    opacity: 0.65;
}

.hero-pub-link--disabled:hover {
    background: rgba(0, 0, 0, 0.04);
    color: var(--text-secondary);
    border-color: rgba(0, 0, 0, 0.1);
    transform: none;
}

/* ----- Research Tags in Hero ----- */
.hero-module--research {
    background: linear-gradient(135deg, #fafbff 0%, #f0f4ff 100%);
    border: 1px solid #e8eeff;
}

.hero-research-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.hero-research-tag {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 8px 16px;
    background: #fff;
    border: 1.5px solid rgba(102, 126, 234, 0.2);
    border-radius: 24px;
    font-size: 13.5px;
    font-weight: 500;
    color: var(--text-primary);
    transition: all var(--transition-speed) ease;
    cursor: default;
}

.hero-research-tag i {
    font-size: 12px;
    color: var(--primary-color);
}

.hero-research-tag:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: #ffffff;
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: 0 4px 14px rgba(102, 126, 234, 0.3);
}

.hero-research-tag:hover i {
    color: #ffffff;
}

/* Section Styles */
.section {
    padding: var(--section-padding);
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 60px;
    position: relative;
    padding-bottom: 20px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
}

/* About Section */
.about {
    background: var(--background-light);
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    margin-bottom: 60px;
}

.about-text {
    font-size: 18px;
    line-height: 1.8;
    color: var(--text-secondary);
}

.about-text p {
    margin-bottom: 20px;
}

/* Supervisor links styling */
.supervisor-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    border-bottom: 1px solid transparent;
    transition: all var(--transition-speed) ease;
}

.supervisor-link:hover {
    color: var(--primary-dark);
    border-bottom-color: var(--primary-dark);
}

.education-details .supervisor-link {
    color: var(--primary-color);
}

.research-interests h3 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.interest-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag {
    padding: 8px 16px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--text-light);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    transition: transform var(--transition-speed) ease;
}

.tag:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.education h3 {
    font-size: 28px;
    margin-bottom: 30px;
    color: var(--text-primary);
}

.education-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    margin-bottom: 30px;
}

.education-icon {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 24px;
    overflow: hidden;
}

.education-icon .school-logo {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 5px;
    background: white;
}

.education-details h4 {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.education-details .institution {
    color: var(--text-secondary);
    font-size: 16px;
    margin-bottom: 3px;
}

.education-details .year {
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 3px;
}

.education-details .supervisor {
    color: var(--text-secondary);
    font-size: 14px;
    font-style: italic;
}

/* Publications Section */
.section.publications {
    background: var(--background-gray);
}

/* News Section */
.section.news {
    background: var(--background-light);
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.news-item {
    display: flex;
    align-items: flex-start;
    gap: 30px;
    padding: 25px;
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: all var(--transition-speed) ease;
}

.news-item:hover {
    box-shadow: 0 4px 16px rgba(102, 126, 234, 0.15);
    transform: translateX(5px);
}

.news-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 80px;
    padding: 15px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 12px;
    color: white;
}

.news-month {
    font-size: 18px;
    font-weight: 700;
    text-transform: uppercase;
}

.news-year {
    font-size: 24px;
    font-weight: 700;
}

.news-content h3 {
    font-size: 18px;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.news-content p {
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
}

/* Accepted Paper Badge */
.badge.accepted {
    display: inline-block;
    padding: 4px 12px;
    background: linear-gradient(135deg, #48bb78, #38a169);
    color: white;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    margin-right: 8px;
}

.publication-card.accepted {
    border-left: 4px solid #48bb78;
}

.pub-link.coming-soon {
    color: var(--text-secondary);
    border-color: var(--text-secondary);
    cursor: not-allowed;
    opacity: 0.6;
}

.pub-link.coming-soon:hover {
    background: transparent;
    color: var(--text-secondary);
    transform: none;
}

/* Publications Section */
.publications {
    background: var(--background-gray);
}

.publications-list {
    display: flex;
    flex-direction: column;
    gap: 30px;
    margin-bottom: 40px;
}

.publication-card {
    background: var(--background-light);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    display: flex;
    gap: 25px;
    transition: all var(--transition-speed) ease;
}

.publication-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(102, 126, 234, 0.2);
}

.publication-icon {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 20px;
    overflow: hidden;
}

.publication-icon .paper-thumbnail {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Publication card with background image */
.publication-card.has-bg-image {
    position: relative;
    overflow: hidden;
}

.publication-card.has-bg-image {
    display: flex;
    gap: 25px;
    padding: 30px;
}

.publication-card.has-bg-image .pub-bg-image {
    flex-shrink: 0;
    width: 280px;
    min-height: 200px;
    background-size: contain;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 1;
    border-radius: 8px;
}

.publication-card.has-bg-image .publication-content {
    flex: 1;
}

.publication-content h3 {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 10px;
    line-height: 1.4;
}

.publication-content .authors {
    color: var(--text-secondary);
    font-size: 15px;
    margin-bottom: 8px;
}

.publication-content .journal {
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 15px;
}

.publication-links {
    display: flex;
    gap: 15px;
}

.pub-link {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 14px;
    background: var(--background-gray);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 6px;
    font-size: 14px;
    transition: all var(--transition-speed) ease;
}

.pub-link:hover {
    background: var(--primary-color);
    color: var(--text-light);
}

.publications-more {
    text-align: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 12px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-speed) ease;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--text-light);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, 0.4);
}

/* Awards Section */
.awards {
    background: var(--background-light);
}

.awards-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.award-card {
    background: var(--background-gray);
    border-radius: 12px;
    padding: 30px;
    display: flex;
    gap: 30px;
    align-items: center;
    transition: all var(--transition-speed) ease;
}

.award-card:hover {
    transform: translateX(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.award-year {
    flex-shrink: 0;
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    min-width: 80px;
}

.award-content h3 {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.award-content p {
    color: var(--text-secondary);
    font-size: 16px;
}

/* Contact Section */
.contact {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--text-light);
}

.contact .section-title {
    color: var(--text-light);
}

.contact .section-title::after {
    background: var(--text-light);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-item i {
    font-size: 32px;
    color: rgba(255, 255, 255, 0.9);
    margin-top: 5px;
}

.contact-item h3 {
    font-size: 20px;
    margin-bottom: 8px;
    color: var(--text-light);
}

.contact-item a,
.contact-item p {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-size: 16px;
    line-height: 1.6;
}

.contact-item a:hover {
    text-decoration: underline;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 12px;
    color: var(--text-light);
    text-decoration: none;
    transition: all var(--transition-speed) ease;
    backdrop-filter: blur(10px);
}

.contact-link:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateX(10px);
}

.contact-link i {
    font-size: 28px;
}

.contact-link span {
    font-size: 18px;
    font-weight: 600;
}

/* Footer */
.footer {
    background: rgba(0, 0, 0, 0.8);
    color: rgba(255, 255, 255, 0.8);
    text-align: center;
    padding: 30px 0;
    font-size: 14px;
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--fade-duration) ease, transform var(--fade-duration) ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
    }

    .hero-sidebar {
        width: 260px;
    }

    .hero-main {
        padding: 30px 28px;
    }
}

@media (max-width: 768px) {
    /* Nav */
    .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--background-light);
        flex-direction: column;
        padding: 20px;
        gap: 20px;
        box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    /* Hero: stack vertically on mobile */
    .hero.hero-split {
        flex-direction: column;
        min-height: auto;
    }

    .hero-sidebar {
        position: static;
        width: 100%;
        height: auto;
        min-height: auto;
    }

    .hero-sidebar-inner {
        padding: 36px 24px 28px;
    }

    .profile-image {
        width: 130px;
        height: 130px;
    }

    .hero-title {
        font-size: 26px;
    }

    .hero-main {
        min-height: auto;
        padding: 24px 20px;
        gap: 24px;
    }

    .hero-module {
        padding: 20px 18px;
    }

    .sidebar-stats {
        max-width: 280px;
    }

    .section-title {
        font-size: 28px;
    }

    .publication-card {
        flex-direction: column;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .award-card {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 24px;
    }

    .profile-image {
        width: 110px;
        height: 110px;
    }

    .section {
        padding: 60px 0;
    }

    .hero-main {
        padding: 20px 16px;
    }

    .hero-module {
        padding: 18px 16px;
    }

    .hero-module-title {
        font-size: 17px;
    }

    .hero-news-item {
        flex-direction: column;
        gap: 10px;
    }

    .hero-news-date {
        flex-direction: row;
        gap: 6px;
        padding: 6px 12px;
        min-width: auto;
        width: fit-content;
    }

    .hero-pub-links {
        flex-wrap: wrap;
    }
}