/* Main CSS for Ágata Alveirinho Dias Website */

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

:root {
    /* Color Palette - Scientific Theme */
    --primary-color: #1e3a8a;      /* Deep Blue */
    --secondary-color: #0ea5e9;    /* Light Blue */
    --accent-color: #06b6d4;       /* Cyan */
    --text-primary: #1f2937;       /* Dark Gray */
    --text-secondary: #6b7280;     /* Medium Gray */
    --text-light: #9ca3af;         /* Light Gray */
    --background-white: #ffffff;
    --background-light: #f8fafc;
    --background-section: #f1f5f9;
    --border-color: #e5e7eb;
    --shadow-light: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-large: 0 10px 25px rgba(0, 0, 0, 0.1);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-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;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

body {
    font-family: var(--font-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--background-white);
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
}

h2 {
    font-size: var(--font-size-3xl);
    font-weight: 600;
}

h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
}

h4 {
    font-size: var(--font-size-lg);
    font-weight: 500;
}

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

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

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

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* Navigation */
.navbar {
    background-color: var(--background-white);
    box-shadow: var(--shadow-light);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all var(--transition-normal);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo h2 {
    color: var(--primary-color);
    margin: 0;
    font-size: var(--font-size-xl);
}

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

.nav-link {
    color: var(--text-primary);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #ffffff 0%, #fafbfc 50%, #f5f7fa 100%);
    padding: 120px 0 var(--spacing-3xl);
    margin-top: 70px;
    position: relative;
    overflow: hidden;
    min-height: calc(100vh - 70px);
    display: flex;
    align-items: center;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 200 200"><defs><pattern id="subtle-grain" width="200" height="200" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="0.8" fill="%23e8e9ec" opacity="0.15"/><circle cx="150" cy="150" r="0.8" fill="%23e8e9ec" opacity="0.15"/><circle cx="100" cy="20" r="0.5" fill="%23e8e9ec" opacity="0.1"/><circle cx="20" cy="120" r="0.5" fill="%23e8e9ec" opacity="0.1"/><circle cx="180" cy="80" r="0.5" fill="%23e8e9ec" opacity="0.1"/></pattern></defs><rect width="200" height="200" fill="url(%23subtle-grain)"/></svg>');
    opacity: 0.2;
    pointer-events: none;
}

/* Page Header - Uniform style for all pages */
.page-header {
    background: var(--background-white);
    padding: 30px 0;
    margin-top: 70px;
    border-bottom: 1px solid var(--border-color);
}

.page-header .hero-text,
.page-header .container {
    margin-bottom: 0;
}

.page-header h1 {
    color: var(--primary-color);
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: 0;
    text-align: center;
    letter-spacing: -0.02em;
}

.page-header .hero-description {
    color: var(--text-secondary);
    text-align: center;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-base);
}

/* Legacy classes for backward compatibility */
.cruises-hero,
.hydrothermal-hero,
.projects-hero {
    background: var(--background-white) !important;
    padding: 30px 0 !important;
    margin-top: 70px !important;
    border-bottom: 1px solid var(--border-color);
    min-height: auto !important;
    display: block !important;
    align-items: normal !important;
    position: relative !important;
    overflow: visible !important;
}

.cruises-hero::before,
.hydrothermal-hero::before {
    display: none !important;
}

.cruises-hero .hero-text,
.hydrothermal-hero .hero-text {
    margin-bottom: 0;
}

.cruises-hero .hero-text h1,
.hydrothermal-hero .hero-text h1 {
    color: var(--primary-color);
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: 0;
    text-align: center;
    letter-spacing: -0.02em;
}

.cruises-hero .hero-description,
.hydrothermal-hero .hero-description {
    color: var(--text-secondary);
    text-align: center;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-base);
}

.projects-hero .hero-text h1 {
    color: var(--primary-color);
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    text-align: center;
    letter-spacing: -0.02em;
}

.projects-hero .hero-description {
    color: var(--text-secondary);
    font-size: var(--font-size-lg);
    line-height: 1.6;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    font-weight: 400;
}

.hero-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-4xl);
    align-items: center;
    position: relative;
    z-index: 1;
    animation: fadeInUp 0.8s ease-out;
}

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

.hero-text h1 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.hero-text h2 {
    color: var(--secondary-color);
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-md);
}

.institution {
    color: var(--text-primary);
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-xl);
    font-weight: 400;
    line-height: 1.8;
}

.institution-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.institution-link:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

.institution-english {
    color: var(--text-secondary);
    font-style: italic;
    font-size: var(--font-size-sm);
    opacity: 0.9;
    margin-left: 0.5em;
    font-weight: 300;
}

.hero-email {
    margin-bottom: var(--spacing-md);
}

.hero-email .email-link {
    color: var(--primary-color);
    text-decoration: none;
    font-size: var(--font-size-lg);
    font-weight: 500;
    transition: all 0.3s ease;
}

.hero-email .email-link:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

.hero-description {
    font-size: var(--font-size-xl);
    color: var(--primary-color);
    margin-bottom: var(--spacing-xl);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.academic-ids {
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, var(--background-light) 0%, var(--background-white) 100%);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.academic-ids h3 {
    color: var(--primary-color);
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    text-align: center;
    letter-spacing: -0.01em;
}

.ids-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
    max-width: 900px;
    margin: 0 auto;
}

.id-item {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
    background: var(--background-white);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    text-align: center;
}

.id-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
}

.id-label {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.id-value {
    color: var(--primary-color);
    font-size: var(--font-size-base);
    font-weight: 700;
    font-family: 'Courier New', monospace;
    word-break: break-all;
    text-decoration: none;
    transition: all 0.3s ease;
}

.id-value:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

.hero-links {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.profile-placeholder {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-large);
}

.profile-placeholder i {
    font-size: 6rem;
    color: white;
}

.profile-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

/* Hide icon when photo is present */
.profile-placeholder:has(.profile-photo) i {
    display: none;
}

/* Fallback for browsers without :has() support */
.profile-placeholder img {
    display: block;
}

.profile-placeholder img + i {
    display: none;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-weight: 500;
    text-decoration: none;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
    cursor: pointer;
    font-size: var(--font-size-base);
}

.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;
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

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

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

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

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

/* Sections */
section {
    padding: var(--spacing-3xl) 0;
}

section:nth-child(even) {
    background-color: var(--background-section);
}

section h2 {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    color: var(--primary-color);
}

/* Research Interests - List Layout */
.interests-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
    max-width: 1100px;
    margin: 0 auto;
}

.interest-card {
    background: linear-gradient(135deg, var(--background-white) 0%, var(--background-light) 100%);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: 0 6px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(0, 0, 0, 0.06);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    gap: var(--spacing-2xl);
    backdrop-filter: blur(10px);
}

.interest-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 5px;
    background: linear-gradient(180deg, 
        var(--primary-color) 0%, 
        var(--accent-color) 50%, 
        var(--secondary-color) 100%);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.interest-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, 
        rgba(255, 255, 255, 0.1) 0%, 
        rgba(255, 255, 255, 0.05) 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.interest-card:hover {
    transform: translateX(12px);
    box-shadow: 0 16px 60px rgba(0, 0, 0, 0.12);
    border-color: rgba(0, 0, 0, 0.08);
}

.interest-card:hover::before {
    transform: scaleY(1);
}

.interest-card:hover::after {
    opacity: 1;
}

.interest-icon {
    width: 180px;
    height: 180px;
    min-width: 180px;
    background: linear-gradient(135deg, 
        var(--primary-color) 0%, 
        var(--accent-color) 50%, 
        var(--secondary-color) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    flex-shrink: 0;
}

.interest-icon::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.3) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.5s ease;
}

.interest-card:hover .interest-icon {
    transform: scale(1.08) rotate(2deg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
}

.interest-card:hover .interest-icon::before {
    opacity: 1;
}

.interest-icon i {
    font-size: 1.5rem;
    color: white;
}

.interest-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    filter: brightness(0.95) contrast(1.05);
}

.interest-card:hover .interest-image {
    transform: scale(1.08);
    filter: brightness(1) contrast(1.1);
}

/* Hide icon when image is present */
.interest-icon:has(.interest-image) i {
    display: none;
}

/* Fallback for browsers without :has() support */
.interest-icon img {
    display: block;
}

.interest-icon img + i {
    display: none;
}

.interest-content {
    flex: 1;
    text-align: left;
    padding-right: var(--spacing-lg);
}

.interest-card h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    line-height: 1.4;
    letter-spacing: -0.02em;
    position: relative;
}

.interest-card h3::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), transparent);
    transition: width 0.4s ease;
}

.interest-card:hover h3::after {
    width: 100px;
}

.interest-card p {
    color: var(--text-secondary);
    line-height: 1.9;
    font-size: var(--font-size-lg);
    letter-spacing: 0.01em;
    max-width: 85%;
}

/* Keep grid class for backward compatibility */
.interests-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
    max-width: 1100px;
    margin: 0 auto;
}

/* Achievements */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
    text-align: center;
}

.achievement-item {
    padding: var(--spacing-xl);
}

.achievement-number {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.achievement-text {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: var(--font-size-lg);
}

/* Publications */
.publications-grid {
    display: grid;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.publication-card {
    background-color: var(--background-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-medium);
    border-left: 4px solid var(--primary-color);
    transition: transform var(--transition-normal);
}

.publication-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-large);
}

.publication-year {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.publication-card h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
}

.publication-authors {
    color: var(--text-secondary);
    font-style: italic;
    margin-bottom: var(--spacing-sm);
}

.publication-journal {
    color: var(--secondary-color);
    font-weight: 500;
    margin-bottom: var(--spacing-md);
}

.publication-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--primary-color);
    font-weight: 500;
}

.publication-link:hover {
    color: var(--secondary-color);
}

.view-all {
    text-align: center;
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-item {
    background-color: var(--background-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-medium);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 1.5rem;
    color: white;
}

.contact-info h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

.contact-info p {
    margin: 0;
    color: var(--text-secondary);
}

.contact-info a {
    color: var(--primary-color);
    font-weight: 500;
}

.contact-address {
    display: block;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.6;
    margin-top: var(--spacing-xs);
    font-style: italic;
}

/* Footer */
.footer {
    background-color: var(--text-primary);
    color: white;
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3,
.footer-section h4 {
    color: white;
    margin-bottom: var(--spacing-lg);
}

.footer-section p {
    color: var(--text-light);
    margin-bottom: var(--spacing-sm);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section ul li a {
    color: var(--text-light);
    transition: color var(--transition-fast);
}

.footer-section ul li a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: var(--spacing-xl);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-light);
    margin: 0;
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }
.mb-5 { margin-bottom: var(--spacing-xl); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }
.mt-5 { margin-top: var(--spacing-xl); }

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Image replacements for icons */
.icon-replacement {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.profile-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.interest-icon img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

/* Fallback for missing images */
.icon-replacement:not([src]),
.icon-replacement[src=""] {
    display: none;
}

.icon-replacement:not([src]) + i,
.icon-replacement[src=""] + i {
    display: inline-block;
}

/* Projects Page Specific Styles */
.projects-hero .hero-text h1 {
    color: var(--primary-color);
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: 0;
    text-align: center;
    letter-spacing: -0.02em;
}

.projects-section {
    padding: var(--spacing-3xl) 0;
    background: var(--background-white);
}

.projects-section:not(:last-child) {
    border-bottom: 1px solid var(--border-color);
}

.projects-section h2 {
    color: var(--primary-color);
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    text-align: center;
    letter-spacing: -0.01em;
}

.projects-section .section-description {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    text-align: center;
    max-width: 600px;
    margin: 0 auto var(--spacing-xl);
    font-weight: 400;
}

/* Professional Project Cards */
.project-card {
    background: var(--background-white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
}

.project-card:hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
    transform: translateY(-2px);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
}

.project-title {
    color: var(--primary-color);
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin: 0;
    letter-spacing: -0.01em;
}

.project-duration {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin: 0;
}

.project-status {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.project-status.completed {
    background: #d1fae5;
    color: #065f46;
}

.project-description {
    color: var(--text-primary);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.project-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.project-detail {
    display: flex;
    flex-direction: column;
}

.project-detail-label {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: 4px;
}

.project-detail-value {
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.project-keywords {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.badge {
    padding: 4px 8px;
    border-radius: 6px;
    font-size: var(--font-size-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary {
    background: #dbeafe;
    color: #1e40af;
}

.badge-secondary {
    background: #f3e8ff;
    color: #7c3aed;
}

.badge-info {
    background: #ecfdf5;
    color: #059669;
}

/* Scientific Project List */
.project-list {
    max-width: 1000px;
    margin: 0 auto;
}

.project-item {
    background: var(--background-white);
    border-left: 4px solid var(--primary-color);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    border-radius: 8px;
    transition: all 0.3s ease;
}

.project-item:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    transform: translateY(-2px);
    border-left-color: var(--accent-color);
}

.project-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
}

.project-item-title {
    color: var(--primary-color);
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin: 0;
    letter-spacing: -0.01em;
}

.project-item-duration {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin: 0;
    white-space: nowrap;
}

.project-item-description {
    color: var(--text-primary);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.project-item-details {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.project-item-detail {
    display: flex;
    flex-direction: column;
}

.project-item-detail-label {
    color: var(--text-secondary);
    font-size: var(--font-size-xs);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
}

.project-item-detail-value {
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.project-item-links {
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border-color);
}

.project-item-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-sm);
    padding: 4px 8px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.project-item-link:hover {
    background: var(--primary-color);
    color: var(--background-white);
}

.project-item-link i {
    font-size: var(--font-size-xs);
}

/* Responsive images */
@media (max-width: 767px) {
    .icon-replacement {
        max-width: 60px;
        max-height: 60px;
    }
}