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

html {
    scroll-behavior: smooth;
}

:root {
    /* Colors - Light Theme */
    --color-primary: #1e3a8a;
    --color-primary-light: #2563eb;
    --color-primary-dark: #1e40af;
    --color-secondary: #64748b;
    --color-accent: #1e40af;
    
    --color-success: #059669;
    --color-warning: #d97706;
    --color-error: #dc2626;
    
    --color-text-primary: #1f2937;
    --color-text-secondary: #6b7280;
    --color-text-muted: #9ca3af;
    
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f9fafb;
    --color-bg-tertiary: #f3f4f6;
    --color-border: #e5e7eb;
    --color-border-light: #f3f4f6;
    
    /* Typography */
    --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-family-heading: 'Source Serif Pro', Georgia, serif;
    
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    --line-height-tight: 1.2;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Spacing */
    --spacing-1: 0.25rem;
    --spacing-2: 0.5rem;
    --spacing-3: 0.75rem;
    --spacing-4: 1rem;
    --spacing-5: 1.25rem;
    --spacing-6: 1.5rem;
    --spacing-8: 2rem;
    --spacing-10: 2.5rem;
    --spacing-12: 3rem;
    --spacing-16: 4rem;
    --spacing-20: 5rem;
    --spacing-24: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Shadows */
    --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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* Container */
    --container-max-width: 1200px;
    --container-padding: var(--spacing-4);
}


/* Base Typography */
body {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-4);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
    margin-bottom: var(--spacing-4);
    color: var(--color-text-secondary);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
}

ul, ol {
    margin-left: var(--spacing-6);
    margin-bottom: var(--spacing-4);
}

li {
    margin-bottom: var(--spacing-2);
    color: var(--color-text-secondary);
}

/* Layout */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

.main-content {
    min-height: 100vh;
    padding-top: var(--spacing-20);
}

.section {
    margin-bottom: var(--spacing-16);
}

.section-title {
    margin-bottom: var(--spacing-8);
    text-align: center;
    position: relative;
    display: inline-block;
    width: 100%;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 2px;
}

.page-header {
    text-align: center;
    margin-bottom: var(--spacing-16);
}

.page-title {
    margin-bottom: var(--spacing-4);
}

.page-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: 0;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-normal);
    backdrop-filter: blur(20px);
}

.header-scrolled {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    background: rgba(255, 255, 255, 0.98);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-4) 0;
}

.logo {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
}

.nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-8);
}

.nav-links {
    display: flex;
    list-style: none;
    margin: 0;
    gap: var(--spacing-6);
}

.nav-link {
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, #1e3a8a, #2563eb);
    border-radius: var(--radius-sm);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text-primary);
    font-size: var(--font-size-xl);
    cursor: pointer;
}

/* Hero Section */
.hero {
    padding: var(--spacing-24) 0 var(--spacing-20);
    background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 50%, #3b82f6 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: var(--font-size-5xl);
    margin-bottom: var(--spacing-4);
    line-height: var(--line-height-tight);
    color: white;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    background: linear-gradient(45deg, #fff, #f0f8ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-medium);
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: var(--spacing-2);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}

.hero-institution {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-6);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}

.hero-objective {
    margin-bottom: var(--spacing-8);
    background: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-6);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-objective p {
    font-size: var(--font-size-lg);
    line-height: var(--line-height-relaxed);
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 0;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-8);
}


/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3) var(--spacing-6);
    font-weight: var(--font-weight-medium);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    font-size: var(--font-size-base);
    line-height: 1;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn-primary {
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-primary:hover {
    background: linear-gradient(45deg, #764ba2, #667eea);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.6);
}

.btn-outline {
    background-color: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
}

/* Profile Links */
.profile-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-4);
    flex-wrap: wrap;
}

.profile-links.large {
    gap: var(--spacing-6);
}

.profile-link {
    padding: var(--spacing-2) var(--spacing-4);
    background: rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.9);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-normal);
    border: 1px solid rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(10px);
}

.profile-links.large .profile-link {
    padding: var(--spacing-3) var(--spacing-6);
    font-size: var(--font-size-base);
    background-color: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

.profile-link:hover {
    background: rgba(255, 255, 255, 0.3);
    color: white;
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.5);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.profile-links.large .profile-link:hover {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

/* Cards */
.card {
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #1e3a8a, #2563eb, #3b82f6);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.card:hover::before {
    transform: scaleX(1);
}

.card:hover {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
    transform: translateY(-5px);
}

.card-title {
    margin-bottom: var(--spacing-3);
    color: var(--color-text-primary);
}

.card-subtitle {
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-2);
}

.card-meta {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-3);
}

/* Grids */
.education-grid,
.stats-grid,
.highlights-grid,
.subjects-grid,
.skills-grid,
.service-grid,
.achievements-grid {
    display: grid;
    gap: var(--spacing-6);
}

.education-grid {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.stats-grid {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-4);
}

.highlights-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.subjects-grid,
.skills-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.service-grid,
.achievements-grid {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

/* Stats */
.stat-card {
    text-align: center;
    padding: var(--spacing-6);
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(240, 147, 251, 0.1));
    border-radius: var(--radius-lg);
    border: 1px solid rgba(102, 126, 234, 0.2);
    backdrop-filter: blur(10px);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transform: rotate(45deg);
    transition: all 0.6s;
    opacity: 0;
}

.stat-card:hover::before {
    opacity: 1;
    top: -100%;
    left: -100%;
}

.stat-card:hover {
    transform: translateY(-5px) scale(1.02);
    box-shadow: 0 15px 35px rgba(30, 58, 138, 0.3);
}

.stat-number {
    display: block;
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    background: linear-gradient(45deg, #1e3a8a, #2563eb);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-2);
}

.stat-label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: var(--spacing-8);
}

.timeline::before {
    content: '';
    position: absolute;
    left: var(--spacing-4);
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--color-border);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-8);
    padding-left: var(--spacing-6);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -6px;
    top: var(--spacing-6);
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--color-primary);
    border: 3px solid var(--color-bg-primary);
}

.timeline-content {
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    box-shadow: var(--shadow-sm);
}

.timeline-header {
    margin-bottom: var(--spacing-4);
}

.timeline-title {
    margin-bottom: var(--spacing-2);
}

.timeline-institution {
    color: var(--color-primary);
    font-weight: var(--font-weight-medium);
    margin-bottom: var(--spacing-1);
}

.timeline-duration {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Publications */
.publication-controls {
    margin-bottom: var(--spacing-8);
}

.search-bar {
    display: flex;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-4);
}

.search-bar input {
    flex: 1;
    padding: var(--spacing-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
}

.search-bar input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-bar button {
    padding: var(--spacing-3) var(--spacing-6);
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: var(--font-weight-medium);
    transition: background-color var(--transition-fast);
}

.search-bar button:hover {
    background-color: var(--color-primary-dark);
}

.filters {
    display: flex;
    gap: var(--spacing-3);
    flex-wrap: wrap;
}

.filters select {
    padding: var(--spacing-2) var(--spacing-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
}

.filters button {
    padding: var(--spacing-2) var(--spacing-4);
    background-color: var(--color-bg-secondary);
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.filters button:hover {
    background-color: var(--color-bg-tertiary);
}

.publication-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--spacing-4);
    margin-bottom: var(--spacing-8);
    padding: var(--spacing-6);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
}

.stat-item {
    text-align: center;
}

.publication-item {
    margin-bottom: var(--spacing-6);
}

.empty-state {
    text-align: center;
    padding: var(--spacing-16);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border-light);
}

.empty-state h3 {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-4);
}

.empty-state p {
    color: var(--color-text-muted);
}

.empty-state code {
    background-color: var(--color-bg-tertiary);
    padding: var(--spacing-1) var(--spacing-2);
    border-radius: var(--radius-sm);
    font-family: 'Courier New', monospace;
    font-size: var(--font-size-sm);
}

/* Contact */
.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-12);
}

.contact-cards {
    display: grid;
    gap: var(--spacing-4);
}

.contact-card {
    padding: var(--spacing-4);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border-light);
}

.contact-card h4 {
    margin-bottom: var(--spacing-3);
    color: var(--color-primary);
}

.contact-card p {
    margin-bottom: var(--spacing-2);
}

.profile-links-section {
    margin-top: var(--spacing-8);
}

.profile-links-section h3 {
    margin-bottom: var(--spacing-4);
}

/* Forms */
.contact-form {
    display: grid;
    gap: var(--spacing-5);
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: var(--spacing-2);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

.form-group input,
.form-group textarea {
    padding: var(--spacing-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-success {
    text-align: center;
    padding: var(--spacing-8);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-success);
}

.form-success h3 {
    color: var(--color-success);
    margin-bottom: var(--spacing-4);
}

/* Lists */
.activities-list,
.strengths-list {
    display: grid;
    gap: var(--spacing-4);
}

.activity-item,
.strength-item {
    padding: var(--spacing-4);
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--color-primary);
}

/* Footer */
.footer {
    background-color: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-8) 0;
    margin-top: var(--spacing-16);
    text-align: center;
    color: var(--color-text-muted);
}

/* Experience Summary */
.experience-summary {
    margin-top: var(--spacing-4);
}

.total-experience {
    display: inline-block;
    padding: var(--spacing-2) var(--spacing-4);
    background-color: var(--color-primary);
    color: white;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
}

.teaching-philosophy {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-6);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--color-primary);
}

.teaching-philosophy ul {
    margin-left: var(--spacing-6);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .contact-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-8);
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-3);
    }
    
    .main-content {
        padding-top: var(--spacing-16);
    }
    
    .hero {
        padding: var(--spacing-16) 0 var(--spacing-12);
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-actions {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-bg-primary);
        border-top: 1px solid var(--color-border);
        flex-direction: column;
        padding: var(--spacing-4);
        box-shadow: var(--shadow-lg);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav {
        position: relative;
    }
    
    .search-bar {
        flex-direction: column;
    }
    
    .filters {
        flex-direction: column;
    }
    
    .filters select,
    .filters button {
        width: 100%;
    }
    
    .publication-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .timeline {
        padding-left: var(--spacing-6);
    }
    
    .timeline-item {
        padding-left: var(--spacing-4);
    }
    
    .section {
        margin-bottom: var(--spacing-12);
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    .profile-links {
        justify-content: center;
    }
    
    .publication-stats {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .education-grid,
    .highlights-grid,
    .subjects-grid,
    .skills-grid,
    .service-grid,
    .achievements-grid,
    .phd-candidates-grid {
        grid-template-columns: 1fr;
    }
}

/* Print Styles */
@media print {
    .header,
    .footer,
    .hero-actions,
    .theme-toggle,
    .mobile-menu-toggle,
    .publication-controls,
    .contact-form-container {
        display: none !important;
    }
    
    .main-content {
        padding-top: 0;
    }
    
    .hero {
        padding: var(--spacing-8) 0;
    }
    
    body {
        color: #000;
        background-color: #fff;
    }
    
    .card,
    .timeline-content {
        border: 1px solid #ddd;
        box-shadow: none;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Focus styles for better keyboard navigation */
button:focus,
input:focus,
textarea:focus,
select:focus,
a:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}