/* ========================================
   Dr. Pushyami Kaveti - Academic Portfolio
   Ocean-inspired, modern academic design
   ======================================== */

:root {
    --deep-ocean: #0a1628;
    --ocean-dark: #0f2440;
    --ocean-mid: #163a5f;
    --ocean-accent: #1d8cf8;
    --ocean-glow: #00d4ff;
    --teal: #2dd4bf;
    --teal-soft: rgba(45, 212, 191, 0.12);
    --warm-white: #f8fafc;
    --off-white: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-light: #94a3b8;
    --card-bg: #ffffff;
    --card-border: #e2e8f0;
    --card-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.03);
    --card-shadow-hover: 0 20px 60px rgba(0,0,0,0.1), 0 4px 16px rgba(0,0,0,0.05);
    --radius: 14px;
    --radius-lg: 22px;
    --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --max-width: 1200px;
}

/* ---- Reset & Base ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--text-primary);
    background: var(--warm-white);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---- Typography ---- */
h1, h2, h3, h4 { font-weight: 600; line-height: 1.3; }
.section-title {
    font-family: 'Playfair Display', serif;
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 700;
    text-align: center;
    margin-bottom: 12px;
    position: relative;
}
.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--ocean-accent), var(--teal));
    margin: 16px auto 0;
    border-radius: 2px;
}
.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.05rem;
    max-width: 640px;
    margin: 0 auto 48px;
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}
.btn-primary {
    background: linear-gradient(135deg, var(--ocean-accent), var(--teal));
    color: #fff;
    box-shadow: 0 4px 15px rgba(29, 140, 248, 0.3);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(29, 140, 248, 0.4);
}
.btn-outline {
    border: 2px solid rgba(255,255,255,0.3);
    color: #fff;
    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(4px);
}
.btn-outline:hover {
    border-color: var(--teal);
    background: rgba(45, 212, 191, 0.1);
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
}
.navbar.scrolled {
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--card-border);
    padding: 10px 0;
    box-shadow: 0 1px 10px rgba(0,0,0,0.05);
}
.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-logo {
    font-family: 'Playfair Display', serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: #fff;
    transition: var(--transition);
}
.navbar.scrolled .nav-logo { color: var(--text-primary); }
.nav-menu {
    display: flex;
    gap: 8px;
}
.nav-menu a {
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    color: rgba(255,255,255,0.8);
    transition: var(--transition);
}
.nav-menu a:hover {
    background: rgba(255,255,255,0.1);
    color: #fff;
}
.navbar.scrolled .nav-menu a {
    color: var(--text-secondary);
}
.navbar.scrolled .nav-menu a:hover,
.navbar.scrolled .nav-menu a.active {
    color: var(--ocean-accent);
    background: rgba(29, 140, 248, 0.06);
}
.nav-menu a.active {
    color: #fff;
    background: rgba(255,255,255,0.12);
}
.navbar.scrolled .nav-menu a.active {
    color: var(--ocean-accent);
    background: rgba(29, 140, 248, 0.08);
}
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.nav-toggle span {
    width: 24px;
    height: 2px;
    background: #fff;
    border-radius: 2px;
    transition: var(--transition);
}
.navbar.scrolled .nav-toggle span { background: var(--text-primary); }

/* ============================================
   HERO
   ============================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: linear-gradient(135deg, var(--deep-ocean) 0%, var(--ocean-dark) 40%, var(--ocean-mid) 100%);
    overflow: hidden;
    padding: 100px 24px 60px;
}
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 60% at 70% 40%, rgba(29,140,248,0.08) 0%, transparent 60%),
        radial-gradient(ellipse 60% 50% at 20% 80%, rgba(45,212,191,0.06) 0%, transparent 50%);
    pointer-events: none;
}
.hero-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
}
.hero-particles .particle {
    position: absolute;
    width: 3px;
    height: 3px;
    background: rgba(255,255,255,0.15);
    border-radius: 50%;
    animation: float-up linear infinite;
}
@keyframes float-up {
    0% { transform: translateY(100vh) scale(0); opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}
.hero-content {
    max-width: var(--max-width);
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 40px;
    position: relative;
    z-index: 2;
}
.hero-intro-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.95fr);
    align-items: start;
    gap: 60px;
}
.hero-text { min-width: 0; }
.hero-image-column {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 28px;
}
.hero-greeting {
    font-size: 1.1rem;
    color: var(--teal);
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 12px;
}
.hero-name {
    font-family: 'Playfair Display', serif;
    font-size: clamp(2.5rem, 5vw, 3.8rem);
    font-weight: 700;
    color: #fff;
    margin-bottom: 12px;
    line-height: 1.15;
}
.hero-title {
    font-size: 1.3rem;
    color: rgba(255,255,255,0.9);
    font-weight: 500;
    margin-bottom: 4px;
}
.hero-affiliation {
    font-size: 1.05rem;
    color: rgba(255,255,255,0.6);
    margin-bottom: 20px;
}
.hero-tagline {
    font-size: 0.95rem;
    color: var(--teal);
    margin-bottom: 28px;
    letter-spacing: 0.5px;
}
.hero-bio {
    color: rgba(255,255,255,0.82);
    max-width: 760px;
    margin-bottom: 16px;
}
.hero-bio strong {
    color: #fff;
}
.hero-bio-lead {
    font-size: 1.05rem;
    line-height: 1.85;
}
.hero-links {
    display: flex;
    gap: 16px;
    margin-top: 8px;
}
.hero-links a {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1.5px solid rgba(255,255,255,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255,255,255,0.7);
    font-size: 1.1rem;
    transition: var(--transition);
}
.hero-links a:hover {
    border-color: var(--teal);
    color: var(--teal);
    background: rgba(45,212,191,0.1);
    transform: translateY(-3px);
}

/* Hero Image */
.hero-image-wrapper {
    flex-shrink: 0;
}
.hero-education-card {
    width: 100%;
    max-width: 360px;
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(12px);
}
.hero-highlights {
    width: 100%;
    margin-top: 0;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
}
.hero-image-ring {
    width: 320px;
    height: 320px;
    border-radius: 50%;
    padding: 5px;
    background: linear-gradient(135deg, var(--ocean-accent), var(--teal));
    box-shadow: 0 0 60px rgba(29,140,248,0.2), 0 0 120px rgba(45,212,191,0.1);
    animation: ring-glow 4s ease-in-out infinite alternate;
}
@keyframes ring-glow {
    0% { box-shadow: 0 0 40px rgba(29,140,248,0.15), 0 0 80px rgba(45,212,191,0.05); }
    100% { box-shadow: 0 0 60px rgba(29,140,248,0.25), 0 0 120px rgba(45,212,191,0.15); }
}
.hero-image {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid var(--deep-ocean);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255,255,255,0.4);
    font-size: 0.75rem;
    letter-spacing: 2px;
    text-transform: uppercase;
}
.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, rgba(255,255,255,0.4), transparent);
    animation: scroll-pulse 2s ease-in-out infinite;
}
@keyframes scroll-pulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* ============================================
   SECTIONS
   ============================================ */
.section {
    padding: 100px 0;
}
.section:nth-child(even) {
    background: #fff;
}

/* ============================================
   ABOUT
   ============================================ */
.about-intro {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 16px;
}
.about-text > p {
    color: var(--text-secondary);
    margin-bottom: 16px;
}
.about-highlights {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 32px;
}
.highlight-card {
    padding: 16px 14px;
    border-radius: var(--radius);
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    transition: var(--transition);
}
.highlight-card:hover {
    border-color: var(--teal);
    box-shadow: var(--card-shadow-hover);
    transform: translateY(-2px);
}
.highlight-card i {
    font-size: 1.2rem;
    color: var(--ocean-accent);
    margin-bottom: 8px;
}
.highlight-card h4 {
    font-size: 0.88rem;
    margin-bottom: 4px;
    line-height: 1.35;
}
.highlight-card p {
    font-size: 0.76rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Education Timeline */
.about-sidebar {
    position: sticky;
    top: 100px;
    align-self: start;
}
.education-timeline {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--card-shadow);
}
.education-timeline h3 {
    font-size: 1.15rem;
    margin-bottom: 28px;
    color: var(--text-primary);
}
.education-timeline h3 i {
    color: var(--ocean-accent);
    margin-right: 8px;
}
.timeline-item {
    position: relative;
    padding-left: 24px;
    padding-bottom: 28px;
    border-left: 2px solid var(--card-border);
}
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 4px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--ocean-accent);
    border: 2px solid var(--card-bg);
}
.timeline-year {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--ocean-accent);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.timeline-item h4 {
    font-size: 0.95rem;
    margin: 4px 0 2px;
}
.timeline-item p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}
.timeline-detail {
    font-style: italic;
    font-size: 0.82rem !important;
    color: var(--text-light) !important;
    margin-top: 4px;
}

/* ============================================
   NEWS
   ============================================ */
.news {
    background: linear-gradient(180deg, #ffffff 0%, #f5f9fc 100%);
}
.news-layout {
    max-width: 920px;
    margin: 48px auto 0;
    display: grid;
    gap: 32px;
}
.news-year-group {
    display: grid;
    grid-template-columns: 90px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
}
.news-year {
    font-family: 'Playfair Display', serif;
    font-size: 1.7rem;
    line-height: 1;
    color: var(--ocean-accent);
    position: sticky;
    top: 110px;
}
.news-list {
    border-top: 1px solid var(--card-border);
}
.news-item {
    display: grid;
    grid-template-columns: 110px minmax(0, 1fr);
    gap: 18px;
    padding: 16px 0;
    border-bottom: 1px solid var(--card-border);
}
.news-date {
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ocean-accent);
    padding-top: 2px;
}
.news-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.7;
}
.news-text em {
    color: var(--text-primary);
}
.news-type {
    display: inline-block;
    min-width: 92px;
    margin-right: 8px;
    color: var(--text-primary);
    font-weight: 600;
}

/* ============================================
   RESEARCH
   ============================================ */
.research { background: var(--warm-white); }
.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
    margin-top: 48px;
}
.research-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}
.research-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--card-shadow-hover);
    border-color: transparent;
}
.research-card-accent {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--ocean-accent), var(--teal));
    opacity: 0;
    transition: var(--transition);
}
.research-card:hover .research-card-accent { opacity: 1; }
.research-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--teal-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--teal);
    margin-bottom: 16px;
}
.research-card h3 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}
.research-venue {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--ocean-accent);
    margin-bottom: 12px;
}
.research-card > p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 16px;
}
.research-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 16px;
}
.research-tags span {
    font-size: 0.72rem;
    padding: 4px 10px;
    background: var(--warm-white);
    border: 1px solid var(--card-border);
    border-radius: 20px;
    color: var(--text-secondary);
    font-weight: 500;
}
.research-links {
    display: flex;
    gap: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--card-border);
}
.research-links a {
    font-size: 0.82rem;
    font-weight: 500;
    color: var(--ocean-accent);
    display: flex;
    align-items: center;
    gap: 5px;
    transition: var(--transition);
}
.research-links a:hover { color: var(--teal); }

/* ============================================
   EXPERIENCE TIMELINE
   ============================================ */
.experience {
    background: linear-gradient(135deg, var(--deep-ocean), var(--ocean-dark)) !important;
    color: #fff;
}
.experience .section-title { color: #fff; }
.experience .section-title::after {
    background: linear-gradient(90deg, var(--ocean-accent), var(--teal));
}
.exp-timeline {
    max-width: 800px;
    margin: 48px auto 0;
    position: relative;
    padding-left: 40px;
}
.exp-timeline::before {
    content: '';
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--ocean-accent), var(--teal), transparent);
}
.exp-item {
    position: relative;
    margin-bottom: 40px;
}
.exp-item:last-child { margin-bottom: 0; }
.exp-marker {
    position: absolute;
    left: -33px;
    top: 8px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--teal);
    border: 3px solid var(--deep-ocean);
    box-shadow: 0 0 0 3px rgba(45,212,191,0.3);
}
.exp-content {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius);
    padding: 24px 28px;
    transition: var(--transition);
}
.exp-content:hover {
    background: rgba(255,255,255,0.07);
    border-color: rgba(255,255,255,0.15);
}
.exp-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 4px;
}
.exp-header h3 {
    font-size: 1.1rem;
    color: #fff;
}
.exp-date {
    font-size: 0.82rem;
    color: var(--teal);
    font-weight: 500;
    white-space: nowrap;
}
.exp-content h4 {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.7);
    font-weight: 400;
    margin-bottom: 8px;
}
.exp-location {
    font-size: 0.82rem;
    color: rgba(255,255,255,0.4);
    margin-bottom: 10px;
}
.exp-location i { margin-right: 4px; }
.exp-content > p:last-child {
    font-size: 0.88rem;
    color: rgba(255,255,255,0.55);
    line-height: 1.6;
}

/* ============================================
   PUBLICATIONS
   ============================================ */
.scholar-link {
    color: var(--ocean-accent);
    font-weight: 500;
    transition: var(--transition);
}
.scholar-link:hover { color: var(--teal); }
.scholar-link i { margin-right: 4px; }

.pub-list {
    max-width: 900px;
    margin: 0 auto;
}
.pub-item {
    display: flex;
    gap: 24px;
    padding: 24px 0;
    border-bottom: 1px solid var(--card-border);
    transition: var(--transition);
}
.pub-item:hover { background: rgba(29,140,248,0.02); padding-left: 8px; }
.pub-year {
    flex-shrink: 0;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--ocean-accent);
    padding-top: 2px;
    min-width: 48px;
}
.pub-content h4 {
    font-size: 1rem;
    margin-bottom: 6px;
    line-height: 1.45;
}
.pub-authors {
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-bottom: 4px;
}
.pub-venue {
    font-size: 0.85rem;
    color: var(--text-light);
}

/* ============================================
   FIELDWORK
   ============================================ */
.fieldwork {
    background: linear-gradient(135deg, var(--deep-ocean), var(--ocean-dark)) !important;
    color: #fff;
}
.fieldwork .section-title { color: #fff; }
.fieldwork .section-title::after {
    background: linear-gradient(90deg, var(--ocean-accent), var(--teal));
}
.fieldwork .section-subtitle { color: rgba(255,255,255,0.6); }

/* Stats strip */
.field-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin: 40px 0;
    flex-wrap: wrap;
}
.field-stat {
    text-align: center;
}
.stat-number {
    display: block;
    font-family: 'Playfair Display', serif;
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--teal);
    line-height: 1.1;
}
.stat-label {
    display: block;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.45);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-top: 6px;
}

/* Map */
.field-map-wrapper {
    max-width: 900px;
    margin: 0 auto 48px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.06);
    padding: 24px;
}
.field-map {
    width: 100%;
    height: auto;
}
.map-grid line {
    stroke: rgba(45,212,191,0.07);
    stroke-width: 0.5;
    stroke-dasharray: 4 4;
}
.map-land path {
    fill: rgba(45,212,191,0.06);
    stroke: rgba(45,212,191,0.12);
    stroke-width: 0.5;
}
.pin-ring {
    fill: none;
    stroke: var(--teal);
    stroke-width: 1.5;
    opacity: 0.5;
    animation: ping 2.5s cubic-bezier(0, 0, 0.2, 1) infinite;
}
.map-pin:nth-child(odd) .pin-ring { animation-delay: 0.5s; }
.map-pin:nth-child(even) .pin-ring { animation-delay: 1.2s; }
.pin-dot {
    fill: var(--teal);
    filter: drop-shadow(0 0 6px rgba(45,212,191,0.6));
}
.pin-label {
    fill: rgba(255,255,255,0.85);
    font-size: 11px;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
}
.pin-sublabel {
    fill: var(--teal);
    font-size: 9px;
    font-weight: 500;
    font-family: 'Inter', sans-serif;
    opacity: 0.7;
}
@keyframes ping {
    0% { r: 5; opacity: 0.6; }
    75%, 100% { r: 20; opacity: 0; }
}

/* Deployment entries */
.field-entries {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    max-width: 900px;
    margin: 0 auto;
}
.field-entry {
    display: flex;
    gap: 16px;
    padding: 20px 22px;
    border-radius: var(--radius);
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.06);
    transition: var(--transition);
}
.field-entry:hover {
    background: rgba(255,255,255,0.07);
    border-color: rgba(45,212,191,0.2);
    transform: translateY(-2px);
}
.entry-marker {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--teal);
    flex-shrink: 0;
    margin-top: 5px;
    box-shadow: 0 0 8px rgba(45,212,191,0.4);
}
.entry-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}
.entry-coords {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.75rem;
    color: var(--teal);
    font-weight: 500;
    letter-spacing: 0.5px;
}
.entry-date {
    font-size: 0.75rem;
    color: rgba(255,255,255,0.35);
}
.field-entry h4 {
    font-size: 1rem;
    color: #fff;
    font-weight: 600;
    margin-bottom: 3px;
}
.entry-location {
    font-size: 0.78rem;
    color: rgba(255,255,255,0.4);
    display: block;
    margin-bottom: 8px;
}
.field-entry p {
    font-size: 0.82rem;
    color: rgba(255,255,255,0.5);
    line-height: 1.55;
}

/* ============================================
   OPEN SOURCE
   ============================================ */
.opensource { background: #fff; }
.os-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 48px;
}
.os-card {
    padding: 28px 24px;
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    transition: var(--transition);
    display: block;
}
.os-card:hover {
    border-color: var(--ocean-accent);
    box-shadow: var(--card-shadow-hover);
    transform: translateY(-3px);
}
.os-icon {
    font-size: 1.5rem;
    color: var(--text-light);
    margin-bottom: 14px;
    transition: var(--transition);
}
.os-card:hover .os-icon { color: var(--ocean-accent); }
.os-card h3 {
    font-size: 1rem;
    margin-bottom: 8px;
}
.os-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ============================================
   TEACHING
   ============================================ */
.teaching-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 48px;
}
.teaching-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition);
}
.teaching-card:hover {
    box-shadow: var(--card-shadow-hover);
    transform: translateY(-2px);
}
.teaching-icon {
    font-size: 1.5rem;
    color: var(--ocean-accent);
    margin-bottom: 16px;
}
.teaching-card h3 {
    font-size: 1.05rem;
    margin-bottom: 8px;
}
.teaching-role {
    font-size: 0.85rem;
    color: var(--ocean-accent);
    font-weight: 500;
    margin-bottom: 10px;
}
.teaching-card > p:last-child {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Talks */
.subsection-title {
    font-size: 1.3rem;
    margin: 60px 0 28px;
    text-align: center;
    color: var(--text-primary);
}
.talks-list {
    max-width: 800px;
    margin: 0 auto;
}
.talk-item {
    display: flex;
    gap: 20px;
    padding: 16px 0;
    border-bottom: 1px solid var(--card-border);
    align-items: flex-start;
}
.talk-year {
    flex-shrink: 0;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--ocean-accent);
    min-width: 48px;
    padding-top: 1px;
}
.talk-item div {
    font-size: 0.92rem;
    color: var(--text-secondary);
}
.talk-item strong { color: var(--text-primary); }

/* ============================================
   MEDIA
   ============================================ */
.media { background: var(--warm-white); }
.media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 48px;
}
.media-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius);
    padding: 24px;
    transition: var(--transition);
}
.media-card:hover {
    box-shadow: var(--card-shadow-hover);
    transform: translateY(-2px);
}
.media-source {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--ocean-accent);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}
.media-card h4 {
    font-size: 0.95rem;
    line-height: 1.45;
    margin-bottom: 10px;
}
.media-year {
    font-size: 0.82rem;
    color: var(--text-light);
}

/* ============================================
   CONTACT
   ============================================ */
.contact {
    background: linear-gradient(135deg, var(--deep-ocean), var(--ocean-dark)) !important;
    color: #fff;
}
.contact .section-title { color: #fff; }
.contact .section-title::after {
    background: linear-gradient(90deg, var(--ocean-accent), var(--teal));
}
.contact .section-subtitle { color: rgba(255,255,255,0.6); }
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
}
.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 32px 20px;
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius);
    transition: var(--transition);
    background: rgba(255,255,255,0.03);
}
.contact-card:hover {
    border-color: rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.06);
    transform: translateY(-3px);
}
.contact-card i {
    font-size: 1.5rem;
    color: var(--teal);
    margin-bottom: 14px;
}
.contact-card h4 {
    font-size: 0.95rem;
    color: #fff;
    margin-bottom: 4px;
}
.contact-card p {
    font-size: 0.82rem;
    color: rgba(255,255,255,0.5);
}

/* ============================================
   RESEARCH HIGHLIGHTS / BLOG
   ============================================ */
.highlights {
    background: linear-gradient(180deg, #fff 0%, var(--warm-white) 100%);
}
.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-auto-rows: auto;
    gap: 20px;
    max-width: 1100px;
    margin: 48px auto 0;
}
/* Bento placement */
.blog-card:nth-child(1) { grid-column: span 2; grid-row: span 2; }
.blog-card:nth-child(4) { grid-column: span 2; }
.blog-card:nth-child(6) { grid-column: span 2; }
.blog-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 28px 28px;
    position: relative;
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}
/* Compact abstracts for single-column bento cells */
.blog-card:not(.featured) .blog-abstract {
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
/* 2-col cards get more room */
.blog-card:nth-child(4) .blog-abstract,
.blog-card:nth-child(6) .blog-abstract {
    -webkit-line-clamp: 3;
}
.blog-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, var(--ocean-accent), var(--teal));
    opacity: 0;
    transition: var(--transition);
}
.blog-card:hover {
    box-shadow: var(--card-shadow-hover);
    transform: translateY(-4px);
    border-color: transparent;
}
.blog-card:hover::before { opacity: 1; }
.blog-card.featured {
    background: linear-gradient(135deg, var(--ocean-dark), var(--ocean-mid));
    border: none;
    color: #fff;
    padding: 36px 40px;
}
.blog-card.featured .blog-abstract {
    display: block;
    overflow: visible;
    flex: 1;
}
.blog-card.featured::before {
    opacity: 1;
    background: linear-gradient(to bottom, var(--teal), var(--ocean-glow));
}
.blog-card.featured .blog-abstract { color: rgba(255,255,255,0.75); }
.blog-card.featured .impact-item { color: rgba(255,255,255,0.85); background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.1); }
.blog-card.featured .impact-item strong { color: var(--teal); }
.blog-card.featured .blog-links a { color: var(--teal); }
.blog-card.featured .blog-links a:hover { color: var(--ocean-glow); }
.blog-card.featured .blog-category { color: var(--teal); }
.blog-card.featured .blog-date { color: rgba(255,255,255,0.4); }

.blog-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, var(--ocean-accent), var(--teal));
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 4px 14px;
    border-radius: 20px;
}
.blog-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 14px;
}
.blog-category {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--ocean-accent);
    display: flex;
    align-items: center;
    gap: 6px;
}
.blog-date {
    font-size: 0.78rem;
    color: var(--text-light);
}
.blog-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 14px;
    line-height: 1.4;
}
.blog-abstract {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.75;
    margin-bottom: 20px;
}
.blog-impact {
    margin-bottom: 18px;
}
.impact-item {
    font-size: 0.88rem;
    line-height: 1.6;
    padding: 14px 18px;
    background: var(--teal-soft);
    border: 1px solid rgba(45, 212, 191, 0.15);
    border-radius: 10px;
    color: var(--text-primary);
}
.impact-item strong {
    color: var(--ocean-accent);
    font-weight: 600;
}
.blog-links {
    display: flex;
    gap: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--card-border);
}
.blog-card.featured .blog-links {
    border-top-color: rgba(255,255,255,0.1);
}
.blog-links a {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--ocean-accent);
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}
.blog-links a:hover { color: var(--teal); transform: translateX(2px); }

@media (max-width: 968px) {
    .blog-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .blog-card:nth-child(1) { grid-column: span 2; grid-row: span 1; }
    .blog-card:nth-child(4) { grid-column: span 1; }
    .blog-card:nth-child(6) { grid-column: span 2; }
}
@media (max-width: 600px) {
    .blog-grid {
        grid-template-columns: 1fr;
    }
    .blog-card:nth-child(1),
    .blog-card:nth-child(4),
    .blog-card:nth-child(6) { grid-column: span 1; }
    .blog-card { padding: 24px 20px; }
    .blog-card.featured { padding: 28px 24px; }
    .blog-card h3 { font-size: 1.1rem; }
    .blog-card:not(.featured) .blog-abstract {
        -webkit-line-clamp: unset;
    }
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
    background: var(--deep-ocean);
    color: rgba(255,255,255,0.4);
    text-align: center;
    padding: 24px;
    font-size: 0.82rem;
    border-top: 1px solid rgba(255,255,255,0.05);
}

/* ============================================
   SCROLL ANIMATIONS
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: opacity, transform;
}
.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 968px) {
    .hero-content {
        text-align: center;
    }
    .hero-intro-grid {
        grid-template-columns: 1fr;
        gap: 36px;
    }
    .hero-image-column {
        order: -1;
    }
    .hero-image-ring {
        width: 240px;
        height: 240px;
    }
    .hero-links { justify-content: center; }
    .hero-bio { margin-left: auto; margin-right: auto; }
    .hero-education-card { max-width: 520px; }
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .about-sidebar {
        position: static;
    }
    .news-year-group {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    .news-year {
        position: static;
    }
    .news-item {
        grid-template-columns: 1fr;
        gap: 6px;
    }
    .news-type {
        min-width: 0;
    }
    .research-grid { grid-template-columns: 1fr; }
    .field-entries { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .nav-toggle { display: flex; }
    .nav-menu {
        position: fixed;
        top: 0; right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--deep-ocean);
        flex-direction: column;
        padding: 80px 32px 32px;
        gap: 4px;
        transition: var(--transition);
        z-index: 999;
    }
    .nav-menu.active { right: 0; }
    .nav-menu a {
        padding: 14px 16px;
        font-size: 1rem;
        color: rgba(255,255,255,0.8);
    }
    .navbar.scrolled .nav-menu {
        background: #fff;
    }
    .navbar.scrolled .nav-menu a {
        color: var(--text-primary);
    }
    .section { padding: 60px 0; }
    .about-highlights,
    .hero-highlights { grid-template-columns: 1fr 1fr; }
    .exp-timeline { padding-left: 30px; }
    .exp-timeline::before { left: 10px; }
    .exp-marker { left: -28px; }
    .hero { padding: 80px 20px 40px; }
    .hero-name { font-size: 2.2rem; }
    .hero-bio-lead { font-size: 1rem; }
    .os-grid { grid-template-columns: 1fr 1fr; }
    .teaching-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr 1fr; }
    .field-stats { gap: 24px; }
    .stat-number { font-size: 1.6rem; }
    .field-entries { grid-template-columns: 1fr; }
    .field-map-wrapper { padding: 12px; }
}

@media (max-width: 480px) {
    .field-stats { gap: 16px; }
    .stat-number { font-size: 1.3rem; }
    .hero-image-ring { width: 200px; height: 200px; }
    .os-grid { grid-template-columns: 1fr; }
    .contact-grid { grid-template-columns: 1fr; }
    .media-grid { grid-template-columns: 1fr; }
    .pub-item { flex-direction: column; gap: 6px; }
    .talk-item { flex-direction: column; gap: 4px; }
}