/* ============================================
   Shivani Tuli — Simple, Clean Design
   ============================================ */

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: #ffffff;
    color: #1a1a1a;
    line-height: 1.7;
    font-size: 16px;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ============================================
   HEADER
   ============================================ */
header {
    padding: 2rem 0;
    border-bottom: 1px solid #e5e5e5;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.header-left h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: #1a1a1a;
    margin-bottom: 0.25rem;
}

.header-left p {
    font-size: 1rem;
    color: #666;
    font-weight: 400;
}

nav ul {
    display: flex;
    gap: 2rem;
    list-style: none;
}

nav a {
    text-decoration: none;
    color: #1a1a1a;
    font-size: 1rem;
    font-weight: 500;
    transition: color 0.2s;
}

nav a:hover {
    color: #666;
}

nav a.active {
    color: #2563eb;
    font-weight: 600;
}

/* ============================================
   MAIN CONTENT
   ============================================ */
main {
    padding: 3rem 0;
}

/* ============================================
   HOME — INTRO SECTION
   ============================================ */
.intro-section {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 4rem;
    align-items: start;
}

.intro-text p {
    margin-bottom: 1.5rem;
    color: #333;
    font-size: 1rem;
    line-height: 1.8;
}

.profile-image {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.profile-image img {
    width: 280px;
    height: 280px;
    border-radius: 50%;
    object-fit: cover;
    object-position: center top;
}

/* ============================================
   SECTION TITLES
   ============================================ */
.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1a1a1a;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

/* ============================================
   RESEARCH INTERESTS GRID
   ============================================ */
.interests-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem 2rem;
}

.interest-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    color: #333;
}

.interest-item .icon {
    font-size: 1rem;
}

/* ============================================
   EDUCATION
   ============================================ */
.education-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.edu-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.edu-item .icon {
    font-size: 1rem;
    margin-top: 0.15rem;
}

.edu-item p {
    color: #333;
    font-size: 1rem;
    line-height: 1.6;
}

/* ============================================
   SKILLS
   ============================================ */
.skills-section {
    margin-top: 2rem;
}

.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.75rem 2rem;
}

.skill-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    font-size: 0.95rem;
    color: #333;
}

.skill-item .icon {
    margin-top: 0.15rem;
}

/* ============================================
   NEWS SECTION
   ============================================ */
.news-section {
    margin-top: 3rem;
    padding: 2rem 0;
    border-top: 1px solid #f0f0f0;
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.news-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 0.5rem 0;
}

.news-date {
    font-size: 0.85rem;
    font-weight: 600;
    color: #b45309;
    min-width: 85px;
    flex-shrink: 0;
}

.news-content {
    color: #333;
    font-size: 0.95rem;
    line-height: 1.6;
}

.news-content a {
    color: #2563eb;
    text-decoration: none;
    font-weight: 500;
}

.news-content a:hover {
    text-decoration: underline;
}

/* ============================================
   PUBLICATIONS
   ============================================ */
.publications-section {
    margin-top: 1rem;
}

.pub-subtitle {
    color: #666;
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    font-style: italic;
}

.pub-item {
    margin-bottom: 1rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid #f5f5f5;
}

.pub-item:last-child {
    border-bottom: none;
}

.pub-title {
    font-size: 1rem;
    font-weight: 600;
    color: #2563eb;
    margin-bottom: 0.3rem;
    line-height: 1.4;
}

.pub-title a {
    color: #2563eb;
    text-decoration: none;
}

.pub-title a:hover {
    text-decoration: underline;
}

.pub-authors {
    font-size: 0.9rem;
    color: #444;
    margin-bottom: 0.2rem;
    line-height: 1.5;
}

.pub-authors strong {
    font-weight: 600;
    color: #1a1a1a;
}

.pub-venue {
    font-size: 0.85rem;
    color: #666;
    font-style: italic;
}

/* ============================================
   RESEARCH / PROJECTS SECTIONS
   ============================================ */
.research-section {
    margin-bottom: 2.5rem;
}

.research-section h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 0.5rem;
}

.research-meta {
    font-size: 0.9rem;
    color: #b45309;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.research-section p {
    color: #333;
    line-height: 1.8;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.research-images {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
    flex-wrap: wrap;
}

.research-images img {
    max-width: 280px;
    height: auto;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* ============================================
   CONTACT
   ============================================ */
.contact-info p {
    margin-bottom: 0.5rem;
    color: #333;
}

.contact-info a {
    color: #2563eb;
    text-decoration: none;
}

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

/* ============================================
   FOOTER
   ============================================ */
footer {
    border-top: 1px solid #e5e5e5;
    padding: 1.5rem 0;
    text-align: center;
    color: #999;
    font-size: 0.85rem;
}

/* ============================================
   PAGE TITLE (for inner pages)
   ============================================ */
.page-title {
    margin-bottom: 0.5rem;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 900px) {
    .intro-section {
        grid-template-columns: 1fr;
    }

    .profile-image {
        order: -1;
        margin-bottom: 2rem;
    }

    .header-content {
        flex-direction: column;
        gap: 1rem;
    }

    nav ul {
        gap: 1.5rem;
    }

    .interests-grid,
    .skills-grid {
        grid-template-columns: 1fr;
    }

    .news-item {
        flex-direction: column;
        gap: 0.25rem;
    }

    .news-date {
        min-width: auto;
    }

    .research-images img {
        max-width: 100%;
    }
}

@media (max-width: 600px) {
    .container {
        padding: 0 1.5rem;
    }

    nav ul {
        gap: 1rem;
        flex-wrap: wrap;
    }
}