/* Global Reset & Typography */
:root {
    --primary-color: #2c3e50; /* Dark Slate Blue */
    --accent-color: #2980b9;  /* Blue */
    --bg-color: #ffffff;
    --text-color: #333333;
    --light-text: #666666;
    --border-color: #eaeaea;
    --font-main: 'Roboto', sans-serif;
    --font-serif: 'Lora', serif;
}

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

body {
    font-family: var(--font-main);
    color: var(--text-color);
    line-height: 1.6;
    background-color: var(--bg-color);
}

a {
    color: var(--accent-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* Layout Container */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header & Navigation */
header {
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    z-index: 100;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--primary-color);
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 20px;
}

.nav-links li a {
    color: var(--light-text);
    font-size: 0.95rem;
    font-weight: 400;
}

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

/* Main Content */
main {
    padding-top: 40px;
    padding-bottom: 60px;
}

h1, h2, h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
}

h2 {
    font-size: 1.5rem;
    margin-top: 0;
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

hr {
    border: 0;
    border-top: 1px solid var(--border-color);
    margin: 50px 0;
}

/* Profile Section */
.profile-section {
    display: flex;
    gap: 40px;
    align-items: flex-start;
    margin-bottom: 40px;
}

.profile-img img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.profile-info h1 {
    font-size: 2.2rem;
    margin-bottom: 5px;
}

.subtitle {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--light-text);
    font-style: italic;
    margin-bottom: 15px;
}

.profile-info p {
    margin-bottom: 15px;
}

.social-links {
    margin-top: 20px;
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    color: var(--primary-color);
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
    padding: 5px 10px;
    border-radius: 4px;
    transition: all 0.2s;
}

.social-links a:hover {
    background-color: #f5f5f5;
    text-decoration: none;
}

/* News List */
.news-list {
    list-style: none;
    padding: 0;
}

.news-list li {
    display: flex; /* Creates two separate columns */
    align-items: flex-start; /* Aligns text to the top, preventing 'baseline' jitter */
    margin-bottom: 15px;
}

.news-list .date {
    flex: 0 0 100px; /* Rigid width: Don't grow, don't shrink, stay at 100px */
    font-family: monospace;
    color: var(--light-text);
    font-weight: bold;
    margin-right: 15px; /* Space between date and text */
    padding-top: 2px; /* Visual correction to match text line-height */
}

.news-content {
    flex: 1; /* Takes up all remaining width */
}

/* Publications */
.publication-item {
    margin-bottom: 25px;
}

.pub-title {
    font-weight: 700;
    font-size: 1.05rem;
}

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

.pub-venue {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: 0.9rem;
    color: var(--light-text);
}

/* Experience */
.exp-item {
    margin-bottom: 30px;
}

.exp-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 5px;
}

.exp-header h3 {
    font-size: 1.1rem;
    margin-bottom: 0;
}

.exp-date {
    font-size: 0.9rem;
    color: var(--light-text);
}

.exp-role {
    font-weight: 500;
    color: var(--accent-color);
    margin-bottom: 8px;
}

.exp-details {
    margin-left: 20px;
    font-size: 0.95rem;
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.project-card {
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: 8px;
    transition: transform 0.2s;
}

.project-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.project-card h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.project-card p {
    font-size: 0.9rem;
    color: var(--light-text);
}

/* Footer */
footer {
    text-align: center;
    margin-top: 60px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    font-size: 0.85rem;
    color: var(--light-text);
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    .profile-section {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .profile-img img {
        width: 150px;
        height: 150px;
    }

    .nav-links {
        display: none; /* Simplified for raw HTML, consider adding JS toggle for full menu */
    }
    
    .news-list li {
        flex-direction: column;
    }
    
    .news-list .date {
        margin-bottom: 4px;
    }
}

/* Teaching Section */
.teaching-intro {
    margin-bottom: 20px;
}

.teaching-list {
    list-style: none;
    padding-left: 10px;
}

.teaching-list li {
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #f9f9f9;
    padding-bottom: 8px;
}

.teaching-list li:last-child {
    border-bottom: none;
}

.course-name {
    font-weight: bold;
    color: var(--primary-color);
}

.course-role {
    font-size: 0.9rem;
    color: var(--light-text);
    font-style: italic;
    text-align: right;
}

/* Mobile tweak for teaching list */
@media (max-width: 600px) {
    .teaching-list li {
        flex-direction: column;
        align-items: flex-start;
    }
    .course-role {
        text-align: left;
        margin-top: 2px;
    }
}


/* Project Section Headers */
.project-category-title {
    font-size: 1.3rem;
    color: var(--primary-color);
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 10px;
    margin-bottom: 25px;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Grid Layout */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

/* Card Style */
.project-card {
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

/* Card Image */
.card-img {
    height: 160px;
    overflow: hidden;
    background-color: #f9f9f9;
    border-bottom: 1px solid var(--border-color);
}

.card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.project-card:hover .card-img img {
    transform: scale(1.05);
}

/* Card Content */
.card-content {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

/* Tags */
.tags {
    margin-bottom: 12px;
}

.tag {
    display: inline-block;
    background-color: #f0f4f8;
    color: var(--primary-color);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 4px;
    margin-right: 5px;
    margin-bottom: 5px;
}

/* Card Typography */
.project-card h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    line-height: 1.4;
    color: var(--primary-color);
    border-bottom: none; /* Override default H3 underline */
    padding-bottom: 0;
}

.project-card p {
    font-size: 0.9rem;
    color: var(--light-text);
    margin-bottom: 15px;
    flex-grow: 1; /* Pushes links to bottom */
}

/* Card Links */
.card-links {
    margin-top: auto;
    font-size: 0.9rem;
}

.card-links a {
    font-weight: 600;
    margin-right: 15px;
    color: var(--accent-color);
}

.card-links span {
    color: var(--light-text);
    font-style: italic;
    font-size: 0.85rem;
}

/* Responsive Tweak */
@media (max-width: 600px) {
    .projects-grid {
        grid-template-columns: 1fr;
    }
}