:root {
    --primary: #1E4D80;
    --primary-light: #2E5E94;
    --primary-dark: #0F2D4F;
    --accent: #255A8A;
    --accent-light: #5A93C0;
    --bg: #F8F9FB;
    --bg-alt: #EDF1F5;
    --text: #2D3542;
    --text-light: #6B7785;
    --white: #FFFFFF;
    --border: #D8DEE6;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text);
    background: var(--bg);
    line-height: 1.7;
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(250, 250, 248, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border);
    transition: box-shadow 0.3s ease;
}

nav.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    font-family: 'Playfair Display', serif;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-light);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s;
    letter-spacing: 0.02em;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--text);
    transition: 0.3s;
}

/* Buttons */
.btn {
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    letter-spacing: 0.02em;
    display: inline-block;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(74, 122, 181, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
}

.btn-small {
    padding: 0.5rem 1.2rem;
    font-size: 0.82rem;
}

/* Section styling */
section {
    padding: 5rem 2rem;
}

.section-container {
    max-width: 1100px;
    margin: 0 auto;
}

.section-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.section-title {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-light);
    max-width: 600px;
    margin-bottom: 3rem;
}

/* Tags */
.tag {
    padding: 0.4rem 1rem;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--text-light);
    transition: all 0.3s;
    display: inline-block;
}

.tag:hover {
    border-color: var(--primary-light);
    color: var(--primary);
    background: rgba(74, 122, 181, 0.05);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 100px 2rem 60px;
    background: linear-gradient(135deg, var(--bg) 0%, var(--bg-alt) 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(74, 122, 181, 0.06) 0%, transparent 70%);
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(91, 141, 191, 0.08) 0%, transparent 70%);
}

.hero-container {
    max-width: 1100px;
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text {
    animation: fadeInUp 1s ease;
}

.hero-greeting {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--accent);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.hero-name {
    font-family: 'Playfair Display', serif;
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--primary-dark);
    line-height: 1.15;
    margin-bottom: 1rem;
}

.hero-title {
    font-size: 1.2rem;
    color: var(--text-light);
    font-weight: 400;
    margin-bottom: 1.5rem;
}

.hero-desc {
    font-size: 1rem;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero-cta {
    display: inline-flex;
    gap: 1rem;
}

.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInUp 1s ease 0.3s both;
}

.hero-image-wrapper {
    width: 380px;
    height: 460px;
    border-radius: 20px;
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    padding: 4px;
    position: relative;
}

.hero-image-inner {
    width: 100%;
    height: 100%;
    border-radius: 18px;
    background: var(--bg-alt);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Playfair Display', serif;
    font-size: 6rem;
    color: var(--primary-light);
    overflow: hidden;
}

.hero-image-inner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
    border-radius: 18px;
}

.hero-image-wrapper::after {
    content: '';
    position: absolute;
    bottom: -15px;
    right: -15px;
    width: 80px;
    height: 80px;
    border: 3px solid var(--accent);
    border-radius: 12px;
    z-index: -1;
}

/* Cards */
.card {
    background: var(--white);
    border-radius: 16px;
    padding: 2rem;
    border: 1px solid var(--border);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.08);
    border-color: var(--primary-light);
}

.card-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    margin-bottom: 1.2rem;
}

.card h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.15rem;
    color: var(--primary-dark);
    margin-bottom: 0.8rem;
}

.card p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.7;
}

.card-tag {
    display: inline-block;
    margin-top: 1rem;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

/* Grid layouts */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

/* Timeline */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), var(--accent));
}

.timeline-item {
    position: relative;
    padding-bottom: 2.5rem;
    padding-left: 2rem;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -2rem;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary);
    border: 3px solid var(--white);
    box-shadow: 0 0 0 2px var(--primary);
    transform: translateX(-5px);
}

.timeline-date {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.05em;
    margin-bottom: 0.3rem;
}

.timeline-role {
    font-family: 'Playfair Display', serif;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-dark);
    margin-bottom: 0.2rem;
}

.timeline-org {
    font-size: 0.95rem;
    color: var(--text-light);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.timeline-desc {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* Stats */
.stat-card {
    background: var(--bg);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border);
}

.stat-number {
    font-family: 'Playfair Display', serif;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-top: 0.3rem;
}

/* Newsletter / Subscribe */
.subscribe-section {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: var(--white);
    text-align: center;
}

.subscribe-section .section-label {
    color: var(--accent-light);
}

.subscribe-section .section-title {
    color: var(--white);
}

.subscribe-section .section-subtitle {
    color: rgba(255, 255, 255, 0.75);
    margin-left: auto;
    margin-right: auto;
}

.subscribe-form {
    display: flex;
    gap: 0.8rem;
    max-width: 500px;
    margin: 0 auto;
}

.subscribe-form input[type="email"] {
    flex: 1;
    padding: 0.9rem 1.5rem;
    border-radius: 50px;
    border: 2px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    font-size: 0.95rem;
    font-family: 'Inter', sans-serif;
    outline: none;
    transition: border-color 0.3s;
}

.subscribe-form input[type="email"]::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.subscribe-form input[type="email"]:focus {
    border-color: var(--accent);
}

.subscribe-form button {
    padding: 0.9rem 2rem;
    border-radius: 50px;
    border: none;
    background: var(--accent);
    color: var(--primary-dark);
    font-size: 0.9rem;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: all 0.3s;
    white-space: nowrap;
}

.subscribe-form button:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
}

.subscribe-note {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
    margin-top: 1rem;
}

/* Blog cards */
.blog-card {
    background: var(--white);
    border-radius: 16px;
    border: 1px solid var(--border);
    overflow: hidden;
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
    display: block;
}

.blog-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.08);
    border-color: var(--primary-light);
}

.blog-card-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--primary-light), var(--accent));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.blog-card-body {
    padding: 1.5rem;
}

.blog-card-meta {
    font-size: 0.8rem;
    color: var(--accent);
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 0.5rem;
}

.blog-card-title {
    font-family: 'Playfair Display', serif;
    font-size: 1.2rem;
    color: var(--primary-dark);
    margin-bottom: 0.6rem;
    line-height: 1.4;
}

.blog-card-excerpt {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.blog-card-read {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

/* Blog post page */
.blog-post-header {
    padding: 120px 2rem 3rem;
    background: linear-gradient(135deg, var(--bg) 0%, var(--bg-alt) 100%);
    text-align: center;
}

.blog-post-meta {
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.blog-post-title {
    font-family: 'Playfair Display', serif;
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--primary-dark);
    max-width: 800px;
    margin: 0 auto 1.5rem;
    line-height: 1.2;
}

.blog-post-subtitle {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.blog-post-content {
    max-width: 750px;
    margin: 0 auto;
    padding: 3rem 2rem 5rem;
}

.blog-post-content h2 {
    font-family: 'Playfair Display', serif;
    font-size: 1.8rem;
    color: var(--primary-dark);
    margin: 2.5rem 0 1rem;
}

.blog-post-content h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.4rem;
    color: var(--primary-dark);
    margin: 2rem 0 0.8rem;
}

.blog-post-content p {
    font-size: 1.05rem;
    color: var(--text);
    line-height: 1.9;
    margin-bottom: 1.5rem;
}

.blog-post-content blockquote {
    border-left: 4px solid var(--primary);
    padding: 1rem 1.5rem;
    margin: 2rem 0;
    background: var(--bg-alt);
    border-radius: 0 8px 8px 0;
    font-style: italic;
    color: var(--text-light);
}

.blog-post-content ul,
.blog-post-content ol {
    margin: 1rem 0 1.5rem 1.5rem;
    color: var(--text);
    font-size: 1.05rem;
    line-height: 1.9;
}

.blog-post-content li {
    margin-bottom: 0.5rem;
}

.blog-post-content img {
    max-width: 100%;
    border-radius: 12px;
    margin: 2rem 0;
}

.blog-post-content a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.blog-post-content a:hover {
    color: var(--primary-dark);
}

.blog-post-share {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding-top: 2rem;
    margin-top: 2rem;
    border-top: 1px solid var(--border);
}

.blog-post-share span {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text);
}

/* Blog listing hero */
.blog-hero {
    padding: 120px 2rem 3rem;
    background: linear-gradient(135deg, var(--bg) 0%, var(--bg-alt) 100%);
}

.blog-hero .section-container {
    text-align: center;
}

.blog-hero .section-subtitle {
    margin-left: auto;
    margin-right: auto;
}

/* Dark section */
.dark-section {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    color: var(--white);
}

.dark-section .section-label {
    color: var(--accent-light);
}

.dark-section .section-title {
    color: var(--white);
}

.dark-section .section-subtitle {
    color: rgba(255, 255, 255, 0.75);
}

.dark-item {
    padding: 2rem;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    transition: all 0.3s;
    text-align: center;
}

.dark-item:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-3px);
}

.dark-item h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.dark-item p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

.dark-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

/* Education card */
.edu-card {
    background: var(--white);
    border-radius: 16px;
    padding: 2.5rem;
    border: 1px solid var(--border);
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 2rem;
    align-items: start;
    margin-bottom: 1.5rem;
}

.edu-icon {
    width: 60px;
    height: 60px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    flex-shrink: 0;
}

.edu-info h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.3rem;
    color: var(--primary-dark);
    margin-bottom: 0.3rem;
}

.edu-degree {
    font-size: 1rem;
    color: var(--text);
    font-weight: 500;
    margin-bottom: 0.3rem;
}

.edu-date {
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 0.8rem;
}

.edu-details {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.7;
}

.edu-activities {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.edu-activities .tag {
    font-size: 0.8rem;
}

/* Publication card */
.pub-card {
    background: var(--bg);
    border-radius: 16px;
    padding: 2rem;
    border: 1px solid var(--border);
    display: flex;
    gap: 1.5rem;
    align-items: start;
    transition: all 0.3s;
    text-decoration: none;
    color: inherit;
}

.pub-card:hover {
    border-color: var(--primary-light);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.pub-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent), var(--accent-light));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    flex-shrink: 0;
}

.pub-info h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.1rem;
    color: var(--primary-dark);
    margin-bottom: 0.3rem;
}

.pub-journal {
    font-size: 0.9rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.pub-desc {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* Volunteering */
.vol-card {
    background: var(--white);
    border-radius: 16px;
    padding: 2rem;
    border: 1px solid var(--border);
    transition: all 0.3s;
}

.vol-card:hover {
    border-color: var(--primary-light);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
}

.vol-card h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.1rem;
    color: var(--primary-dark);
    margin-bottom: 0.3rem;
}

.vol-card .vol-org {
    font-size: 0.9rem;
    color: var(--accent);
    font-weight: 500;
    margin-bottom: 0.8rem;
}

.vol-card p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* Contact */
.contact-links {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin-top: 2rem;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.8rem;
    border-radius: 50px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.3s;
    border: 2px solid var(--border);
    color: var(--text);
}

.contact-link:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(74, 122, 181, 0.15);
}

/* Footer */
footer {
    background: var(--primary-dark);
    color: rgba(255, 255, 255, 0.6);
    text-align: center;
    padding: 2rem;
    font-size: 0.85rem;
}

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

/* About interests */
.about-interests {
    background: var(--bg);
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid var(--border);
}

.about-interests h3 {
    font-family: 'Playfair Display', serif;
    font-size: 1.3rem;
    color: var(--primary-dark);
    margin-bottom: 1rem;
}

.interest-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

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

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 900px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-name { font-size: 2.8rem; }

    .hero-desc {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-cta { justify-content: center; }

    .hero-image { order: -1; }

    .hero-image-wrapper {
        width: 280px;
        height: 340px;
    }

    .grid-3 { grid-template-columns: 1fr; }
    .grid-2 { grid-template-columns: 1fr; }

    .edu-card {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .edu-icon { margin: 0 auto; }
    .edu-activities { justify-content: center; }

    .section-title { font-size: 2rem; }

    .blog-post-title { font-size: 2rem; }

    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 1.5rem 2rem;
        border-bottom: 1px solid var(--border);
        gap: 1rem;
    }

    .nav-links.active { display: flex; }
    .hamburger { display: flex; }

    .contact-links {
        flex-direction: column;
        align-items: center;
    }

    .subscribe-form {
        flex-direction: column;
    }

    .pub-card {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .hero-name { font-size: 2.2rem; }
    section { padding: 3.5rem 1.2rem; }
}