/* 
   Teodora Popordanoska Personal Website 
*/

:root {
    /* Colors */
    --color-bg: #FAFAFA;
    --color-bg-light: #FFFFFF;
    --color-bg-alt: #F3F4F6;
    
    --color-primary: #1F2937; /* Dark Charcoal */
    --color-secondary: #4B5563; /* Cool Gray */
    --color-accent: #0D9488; /* Teal */
    --color-accent-rgb: 13, 148, 136; /* Teal RGB for gradients */
    --color-accent-hover: #0F766E;
    
    --color-border: #E5E7EB;
    --color-text: #374151;
    --color-heading: #111827;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Layout */
    --container-width: 1000px;
    --header-height: 80px;
    
    /* 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);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Playfair Display', serif;
    color: var(--color-heading);
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

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

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
}

.text-link {
    font-weight: 500;
    text-decoration: underline;
    text-underline-offset: 4px;
    text-decoration-color: rgba(13, 148, 136, 0.3);
}

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

.section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 3px;
    background-color: var(--color-accent);
}

.bg-light {
    background-color: var(--color-bg-alt);
}

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    font-weight: 500;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
    background-color: var(--color-accent);
    color: white;
    border: 1px solid var(--color-accent);
}

.research-summary {
    margin-bottom: var(--spacing-lg); /* Increased padding text-to-cards */
    color: var(--color-text);
    font-size: 1.05rem;
    line-height: 1.6;
}

.btn:hover {
    background-color: var(--color-accent-hover);
    color: white;
}

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

.btn-outline:hover {
    background-color: var(--color-accent);
    color: white;
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
}

/* Header */
.site-header {
    height: var(--header-height);
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
}

.header-container {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-heading);
}

.main-nav ul {
    display: flex;
    gap: var(--spacing-md);
}

.main-nav a {
    color: var(--color-secondary);
    font-weight: 500;
    font-size: 0.95rem;
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--color-accent);
}
/* Removed border-bottom rule here, handled by ::after now */

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--color-heading);
    cursor: pointer;
}

/* Hero Section */
.hero-section {
    padding-top: calc(var(--header-height) + var(--spacing-xl));
    padding-bottom: var(--spacing-xl);
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
}

.hero-text {
    flex: 1;
}

.hero-image {
    flex: 0 0 350px;
}

.image-wrapper {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    margin: 0 auto;
}

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

.greeting {
    font-family: 'Inter', sans-serif;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    letter-spacing: 1px;
    text-transform: uppercase;
    font-size: 0.9rem;
}

.hero-text h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    line-height: 1.1;
}

.hero-text .role {
    font-size: 1.5rem;
    color: var(--color-secondary);
    font-weight: 400;
    margin-bottom: var(--spacing-md);
    font-family: 'Inter', sans-serif;
}

.highlight {
    color: var(--color-heading); /* Or accent color if preferred */
}

.bio {
    color: var(--color-text);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    max-width: 600px;
}

.bio p {
    margin-bottom: var(--spacing-sm);
}

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

.social-links a {
    color: var(--color-secondary);
    font-size: 1.5rem;
    transition: transform 0.2s, color 0.2s;
}

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

/* Publications Grid */
.publications-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.pub-card {
    background-color: var(--color-bg-light);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: var(--spacing-md);
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: row; /* Back to row */
    gap: 2rem; /* Nice gap */
    align-items: center; /* Center vertically */
    box-shadow: var(--shadow-sm);
}

.pub-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.pub-image {
    flex: 0 0 30%; /* Reduced width */
    max-width: 300px;
    background-color: transparent;
    border: none;
    padding: 0;
    display: flex; /* Centering image in its container */
    align-items: center;
    justify-content: center;
}

/* Navigation Active State */
.main-nav a {
    position: relative;
    padding-bottom: 5px; /* Space for underline */
}

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

.main-nav a.active {
    font-weight: 700;
    color: var(--color-heading); /* Keep text dark/original, don't use accent color */
}

.main-nav a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 0; /* Start width 0 for animation */
    height: 3px;
    background-color: var(--color-accent);
    border-radius: 2px;
    transition: width 0.3s ease-in-out; /* Left to right effect */
}

.main-nav a.active::after {
    width: 100%; /* Expand to full width when active */
}

/* ... existing code ... */

.pub-image img {
    width: 100%;
    height: auto; /* Reverted to auto */
    /* object-fit: contain;  <-- Removed */
    /* object-position: center; <-- Removed */
    border-radius: 4px;
}

.pub-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center; /* Center content vertically too if needed, or let it flow */
}

.pub-year {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pub-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-heading);
    margin-bottom: 0.5rem;
    font-family: 'Inter', sans-serif;
    line-height: 1.3;
}

.pub-authors {
    color: var(--color-text);
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

.pub-desc {
    margin-bottom: var(--spacing-sm);
    color: var(--color-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

.pub-links {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* Mobile responsive adjustments */
@media (max-width: 768px) {
    .pub-card {
        flex-direction: column;
        align-items: flex-start;
    }
    .pub-image {
        flex: 0 0 auto;
        width: 100%;
        max-width: none;
        margin-bottom: 1rem;
    }
}
.news-list {
    border-left: 2px solid var(--color-border);
    padding-left: var(--spacing-md);
}

.news-item {
    position: relative;
    margin-bottom: var(--spacing-md);
}

.news-item::before {
    content: '';
    position: absolute;
    left: calc(-1 * var(--spacing-md) - 6px);
    top: 6px;
    width: 10px;
    height: 10px;
    background-color: var(--color-accent);
    border-radius: 50%;
    border: 2px solid white;
}

.news-date {
    font-weight: 600;
    color: var(--color-heading);
    margin-bottom: 4px;
}

.news-content {
    color: var(--color-text);
}

/* News Timeline Layout */
.news-compact-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.news-year-group {
    position: relative;
}

.news-year-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 2rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-border);
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    user-select: none;
    transition: all 0.3s ease;
}

.news-year-header:hover {
    color: var(--color-accent-hover);
    border-bottom-color: var(--color-accent);
}

.news-year-group.collapsed .news-year-header {
    border-bottom-color: var(--color-border);
    opacity: 0.8;
}

.news-year-group.collapsed .news-year-header:hover {
    opacity: 1;
}

.collapse-indicator {
    font-size: 1.5rem;
    font-weight: 400;
    transition: transform 0.3s ease;
    display: inline-block;
    width: 1.5rem;
    text-align: center;
}

.news-items-group {
    display: flex;
    flex-direction: column;
    gap: 0;
    position: relative;
    max-height: 5000px;
    overflow: hidden;
    transition: max-height 0.5s ease, opacity 0.5s ease;
    opacity: 1;
    padding-left: 140px;
}

.news-year-group.collapsed .news-items-group {
    max-height: 0;
    opacity: 0;
}

/* Vertical timeline line */
.news-items-group::before {
    content: '';
    position: absolute;
    left: 96px;
    top: 12px;
    bottom: 12px;
    width: 2px;
    background-color: var(--color-border);
}

.timeline-news-item {
    display: flex;
    align-items: flex-start;
    position: relative;
    margin-bottom: 1.25rem;
}

.timeline-news-date {
    position: absolute;
    left: -140px;
    top: 0;
    width: 80px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-secondary);
    text-align: right;
    padding-right: 20px;
    white-space: nowrap;
}

.timeline-news-marker {
    position: absolute;
    left: -50px;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--color-bg-light);
    border: 2px solid var(--color-accent);
    z-index: 1;
}

.timeline-news-content {
    flex: 1;
    padding: 0.875rem 1.25rem;
    background: var(--color-bg-light);
    border-left: 3px solid var(--color-border);
    border-radius: 8px;
    transition: all 0.3s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.timeline-news-content:hover {
    border-left-color: var(--color-accent);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.news-text {
    color: var(--color-secondary);
    font-size: 1rem;
    line-height: 1.6;
    margin: 0;
}

.news-text strong {
    color: var(--color-heading);
    font-weight: 600;
}

.news-text img {
    display: inline-block;
    margin: 0 0.2rem;
}

/* Responsive adjustments for mobile */
/* Responsive adjustments for mobile */
@media (max-width: 768px) {
    .news-items-group {
        padding-left: 0;
        padding-top: 1rem;
    }
    
    .news-items-group::before {
        display: none;
    }
    
    .timeline-news-item {
        flex-direction: column;
        margin-bottom: 2rem;
        padding-left: 0;
        margin-left: 0;
        border-left: none;
    }

    .timeline-news-date {
        position: static;
        width: auto;
        text-align: left;
        padding-right: 0;
        margin-bottom: 0.5rem;
        font-size: 0.9rem;
        font-weight: 700;
        color: var(--color-accent);
        white-space: normal;
    }
    
    .timeline-news-marker {
        display: none;
    }
    
    .timeline-news-content {
        width: 100%;
        margin-left: 0;
    }
}

/* Timeline (Education & Experience) */
.timeline {
    position: relative;
}

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

.timeline-item {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-md); /* Reduced from lg to md */
}

.timeline-marker {
    position: absolute;
    left: -5px;
    top: 0;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--color-bg-light);
    border: 2px solid var(--color-accent);
}

.timeline-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.2rem;
    font-family: 'Inter', sans-serif;
}

.timeline-meta {
    font-size: 0.9rem;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    gap: var(--spacing-sm);
}

.timeline-meta .institution {
    font-weight: 500;
    color: var(--color-heading);
}

.timeline-meta .period {
    color: var(--color-accent);
}

.timeline-desc {
    margin-bottom: var(--spacing-sm);
}

/* Footer */
.site-footer {
    padding: var(--spacing-lg) 0;
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-secondary);
    font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
    :root {
        --spacing-xl: 3rem;
        --spacing-md: 1.5rem;
    }
    
    .hero-content {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }

    .hero-image {
        flex: 0 0 auto;
        width: 100%;
        display: flex;
        justify-content: center;
        margin-bottom: var(--spacing-md);
    }
    
    .image-wrapper {
        width: 250px;
        height: 250px;
        max-width: 100%;
    }

    .hero-text h1 {
        font-size: 2.2rem;
        word-wrap: break-word; /* Ensure long names wrap */
    }

    .social-links {
        justify-content: center;
    }

    .bio {
        margin: 0 auto var(--spacing-md) auto;
    }


    .mobile-menu-toggle {
        display: block;
    }

    .main-nav {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: white;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
        display: none;
        box-shadow: var(--shadow-lg);
    }

    .main-nav.active {
        display: block;
    }

    .main-nav ul {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }

    /* Stack publication cards on mobile */
    .pub-card {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .pub-image {
        width: 100%;
        height: auto;
        flex: 0 0 auto;
        border: none;
    }

    /* Reduce timeline padding on mobile */
    .timeline-item {
        padding-left: 2rem;
    }
    
    .pub-image img {
        max-height: 250px; /* Limit height on mobile */
        object-fit: contain;
        margin: 0 auto; /* Center image */
    }
}