@import url('https://fonts.googleapis.com/css2?family=DM+Sans:ital,opsz,wght@0,9..40,300;0,9..40,400;0,9..40,500;0,9..40,600;0,9..40,700;1,9..40,400&display=swap');

/* ================================================
   RESET & BASE
   ================================================ */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-bg: #FAFBFC;
    --color-white: #FFFFFF;
    --color-text: #1A1A2E;
    --color-text-secondary: #000000;
    --color-text-light: #94A3B8;
    --color-accent: #2563EB;
    --color-accent-hover: #1D4ED8;
    --color-accent-light: #EFF6FF;
    --color-border: #E2E8F0;
    --color-border-light: #F1F5F9;
    --color-card: #FFFFFF;
    --color-section-alt: #F8FAFC;
    --color-footer: #1A1A2E;
    --color-footer-text: #CBD5E1;
    --color-success: #059669;
    --color-tag-bg: #F1F5F9;

    --font-family: 'Georgia', 'Times New Roman', serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1.25rem;
    --font-size-lg: 1.3rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 1.8rem;
    --font-size-3xl: 2.4rem;
    --font-size-4xl: 3rem;

    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.08);

    --transition-fast: 0.15s ease;
    --transition-base: 0.25s ease;
    --transition-slow: 0.4s ease;

    --max-width: 1120px;
    --header-height: 64px;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    padding-top: var(--header-height);
}

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

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

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

ul {
    list-style: none;
}

/* ================================================
   TYPOGRAPHY
   ================================================ */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text);
}

h1 { font-size: var(--font-size-4xl); letter-spacing: -0.02em; }
h2 { font-size: var(--font-size-3xl); letter-spacing: -0.01em; }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }

p {
    color: #000000;
    line-height: 1.7;
}

/* ================================================
   LAYOUT
   ================================================ */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.section {
    padding: var(--spacing-4xl) 0;
}

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

.page-header {
    text-align: center;
    padding: var(--spacing-3xl) 0;
}

.page-header h1 {
    margin-bottom: var(--spacing-md);
}

.page-header p {
    max-width: 640px;
    margin: 0 auto;
    font-size: var(--font-size-lg);
}

.page-label {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--spacing-sm);
}

/* ================================================
   HEADER / NAVIGATION
   ================================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: #d4deeb;
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    display: flex;
    align-items: center;
}

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

.header__logo {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.01em;
}

.header__logo span {
    color: var(--color-accent);
}

.header__nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.header__nav a {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.header__nav a:hover {
    color: var(--color-text);
    background-color: var(--color-border-light);
}

.header__nav a.active {
    color: var(--color-accent);
    background-color: var(--color-accent-light);
}

.header__menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    color: var(--color-text);
}

.header__menu-btn svg {
    width: 24px;
    height: 24px;
}

/* Mobile Nav Overlay */
.mobile-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white);
    z-index: 999;
    padding: var(--spacing-lg);
    opacity: 0;
    transform: translateY(-8px);
    transition: all var(--transition-base);
}

.mobile-nav.is-open {
    display: block;
    opacity: 1;
    transform: translateY(0);
}

.mobile-nav a {
    display: block;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: var(--font-size-lg);
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.mobile-nav a:hover,
.mobile-nav a.active {
    color: var(--color-accent);
    background-color: var(--color-accent-light);
}

/* ================================================
   CARDS
   ================================================ */
.card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
}

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

.card h3 {
    margin-bottom: var(--spacing-sm);
}

.card p {
    font-size: var(--font-size-base);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

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

.card-grid--3 {
    grid-template-columns: repeat(3, 1fr);
}

/* ================================================
   HERO (Home Page)
   ================================================ */
.hero {
    padding: var(--spacing-4xl) 0;
}

.hero__inner {
    display: flex;
    gap: var(--spacing-4xl);
    align-items: flex-start;
}

.hero__sidebar {
    width: 280px;
    flex-shrink: 0;
    text-align: center;
}

.hero__avatar {
    width: 260px;
    height: 340px;
    border-radius: var(--radius-full);
    object-fit: cover;
    border: 4px solid var(--color-border);
    margin: var(--spacing-lg);
}

.hero__name {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-xs);
}

.hero__title {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    line-height: 1.5;
}

.hero__socials {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
    flex-wrap: wrap;
}

.hero__socials a {
    width: 40px;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    background: var(--color-border-light);
    transition: all var(--transition-fast);
}

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

.hero__socials img {
    width: 18px;
    height: 18px;
    filter: brightness(0) saturate(100%) invert(35%) sepia(10%) saturate(500%) hue-rotate(180deg);
    transition: filter var(--transition-fast);
}

.hero__socials a:hover img {
    filter: invert(1);
}

.hero__content {
    flex: 1;
    min-width: 0;
}

.hero__content h1 {
    margin-bottom: var(--spacing-lg);
}

.hero__content p {
    margin-bottom: var(--spacing-md);
    text-align: justify;
}

/* ================================================
   OPENINGS BOX
   ================================================ */
.openings {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--color-accent-light);
    border: 1px solid #BFDBFE;
    border-radius: var(--radius-lg);
}

.openings h4 {
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.openings p {
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-md);
}

.openings .btn {
    display: inline-block;
}

/* ================================================
   HIGHLIGHTS
   ================================================ */
.highlights {
    padding: var(--spacing-4xl) 0;
    background: var(--color-section-alt);
}

.highlights__title {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.highlights__grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.highlight-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

.highlight-card ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.highlight-card li {
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border-light);
    line-height: 1.5;
}

.highlight-card li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.highlight-card strong {
    display: block;
    color: var(--color-text);
    font-weight: 600;
    margin-bottom: 2px;
}

.highlight-card span {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* ================================================
   BUTTONS
   ================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 10px 20px;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

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

.btn--outline {
    background: transparent;
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
}

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

.btn--sm {
    padding: 6px 14px;
    font-size: var(--font-size-xs);
}

/* ================================================
   STAT BOXES
   ================================================ */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-xl) 0;
}

.stat-box {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--color-section-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
}

.stat-box__value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-accent);
    display: block;
}

.stat-box__label {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    margin-top: var(--spacing-xs);
    display: block;
}

/* ================================================
   SECTION TITLES
   ================================================ */
.section-heading {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--color-border);
    margin-bottom: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.section-heading:first-child {
    margin-top: 0;
}

/* ================================================
   LISTS (styled)
   ================================================ */
.styled-list {
    padding-left: 0;
}

.styled-list li {
    position: relative;
    padding-left: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
    color: var(--color-text-secondary);
}

.styled-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full);
    background: var(--color-accent);
}

/* ================================================
   TABLE (Publications)
   ================================================ */
.table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-lg);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
    background: var(--color-white);
}

.data-table thead {
    background: var(--color-text);
}

.data-table th {
    padding: var(--spacing-md) var(--spacing-md);
    font-weight: 600;
    font-size: var(--font-size-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-white);
    text-align: left;
    white-space: nowrap;
}

.data-table td {
    padding: var(--spacing-md) var(--spacing-md);
    border-bottom: 1px solid var(--color-border-light);
    color: var(--color-text-secondary);
    vertical-align: top;
}

.data-table tbody tr:hover {
    background: var(--color-section-alt);
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

/* Column widths */
.data-table .col-sno { width: 50px; }
.data-table .col-authors { width: 180px; }
.data-table .col-title { width: 280px; }
.data-table .col-journal { width: 200px; }
.data-table .col-if { width: 70px; text-align: center; }
.data-table .col-vol { width: 70px; text-align: center; }
.data-table .col-page { width: 80px; text-align: center; }
.data-table .col-year { width: 60px; text-align: center; font-weight: 500; color: #000000; }

/* ================================================
   SEARCH INPUT
   ================================================ */
.search-input {
    width: 100%;
    max-width: 360px;
    padding: 10px 16px;
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-white);
    color: var(--color-text);
    outline: none;
    transition: border-color var(--transition-fast);
}

.search-input:focus {
    border-color: var(--color-accent);
}

.search-input::placeholder {
    color: var(--color-text-light);
}

/* ================================================
   TIMELINE (Outreach)
   ================================================ */
.timeline-item {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid var(--color-border-light);
}

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

.timeline-year {
    min-width: 64px;
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--color-accent);
}

.timeline-text {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

/* ================================================
   TEACHING GRID
   ================================================ */
.teaching-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

/* ================================================
   CONTACT PAGE
   ================================================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.contact-card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
}

.contact-card h3 {
    margin-bottom: var(--spacing-md);
}

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

.contact-map {
    width: 100%;
    height: 300px;
    border: none;
    border-radius: var(--radius-md);
}

/* ================================================
   FOOTER
   ================================================ */
.footer {
    background: var(--color-footer);
    color: var(--color-footer-text);
    padding: var(--spacing-3xl) 0 0;
    margin-top: var(--spacing-4xl);
}

.footer__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-2xl);
}

.footer__col h4 {
    color: var(--color-white);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: var(--spacing-lg);
}

.footer__col p {
    font-size: var(--font-size-sm);
    color: var(--color-footer-text);
    line-height: 1.7;
}

.footer__col a {
    color: var(--color-footer-text);
    font-size: var(--font-size-sm);
    display: block;
    margin-bottom: var(--spacing-sm);
    transition: color var(--transition-fast);
}

.footer__col a:hover {
    color: var(--color-white);
}

.footer__col iframe {
    width: 100%;
    height: 160px;
    border: none;
    border-radius: var(--radius-md);
}

.footer__bottom {
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-lg) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    text-align: center;
}

.footer__bottom p {
    font-size: var(--font-size-xs);
    color: var(--color-text-light);
}

/* ================================================
   ANIMATIONS (Scroll Reveal)
   ================================================ */
.fade-in {
    opacity: 1;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.fade-in-left {
    opacity: 0;
    transform: translateX(-30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-left.is-visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-in-right {
    opacity: 0;
    transform: translateX(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-right.is-visible {
    opacity: 1;
    transform: translateX(0);
}

.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }

/* Page load animation */
@keyframes pageLoad {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.page-enter {
    animation: pageLoad 0.5s ease forwards;
}

/* ================================================
   RESPONSIVE
   ================================================ */
@media (max-width: 1024px) {
    .hero__inner {
        gap: var(--spacing-2xl);
    }

    .card-grid--3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-4xl: 2rem;
        --font-size-3xl: 1.5rem;
        --font-size-2xl: 1.25rem;
    }

    .header__nav {
        display: none;
    }

    .header__menu-btn {
        display: block;
    }

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

    .hero__sidebar {
        width: 100%;
    }

    .hero__content p {
        text-align: left;
    }

    .highlights__grid {
        grid-template-columns: 1fr;
    }

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

    .teaching-grid {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

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

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

@media (max-width: 480px) {
    :root {
        --font-size-4xl: 1.75rem;
        --font-size-3xl: 1.375rem;
    }

    .container {
        padding: 0 var(--spacing-md);
    }

    .stat-grid {
        grid-template-columns: 1fr 1fr;
    }
}
/* AVAILABLE POSITIONS */
.highlight-banner {
    margin-top: 40px;
    background: #EFF6FF;
    padding: 25px;
    border-radius: 10px;
}

.highlight-banner h2 {
    color: #0f7c7c;
    margin-bottom: 10px;
}

.positions {
    display: flex;
    gap: 30px;
    margin-top: 15px;
}

.position-box {
    flex: 1;
}

.position-box h4 {
    margin-bottom: 8px;
}

.position-box ul {
    padding-left: 18px;
}

/* CTA */
.contact-cta {
    margin-top: 15px;
    font-weight: bold;
    color: #0f7c7c;
}
/* VISITOR CARD */
.visitor-card {
    display: flex;
    align-items: center;
    gap: 12px;

    background: #ffffff;
    padding: 12px 18px;

    border-radius: 10px;
    border: 1px solid #e5e5e5;

    box-shadow: 0 2px 8px rgba(0,0,0,0.06);

    width: fit-content;
    margin-top: 15px;
}

/* LEFT ICON */
.visitor-icon {
    font-size: 22px;
}

/* RIGHT TEXT */
.visitor-label {
    font-size: 13px;
    color: #666;
    margin-bottom: 2px;
}

.visitor-count {
    font-size: 20px;
    font-weight: bold;
    color: #0f7c7c;
}

/* HOVER EFFECT (SUBTLE) */
.visitor-card:hover {
    transform: translateY(-2px);
    transition: 0.3s;
}
.visitor-card {
    border-left: 4px solid #0f7c7c;
}