:root {
    --primary-color: #0F4C5C;
    /* Deep Teal - Scientific & Calm */
    --primary-dark: #09343F;
    --secondary-color: #C69C6D;
    /* Gold/Bronze - Ancient Wisdom/Santhigiri vibe */
    --accent-color: #E36414;
    /* Slight vibrancy */
    --text-dark: #1A1A1A;
    --text-light: #F4F4F9;
    --text-muted: #666;
    --bg-light: #F9FAFB;
    --bg-white: #FFFFFF;
    --bg-dark: #111827;

    --font-heading: 'Cormorant Garamond', serif;
    --font-body: 'Inter', sans-serif;

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

    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

    --radius-md: 8px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
}

/* Reset & Global */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--text-dark);
    line-height: 1.6;
    background-color: var(--bg-white);
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
.hero-title,
.section-title {
    font-family: var(--font-heading);
    font-weight: 700;
}

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

ul {
    list-style: none;
}

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

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-sm);
}

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

/* Utilities */
.center {
    text-align: center;
}

.left {
    text-align: left;
}

.bg-light {
    background-color: var(--bg-light);
}

.bg-dark {
    background-color: var(--bg-dark);
    color: var(--text-light);
}

.light-text {
    color: var(--text-light) !important;
}

/* Buttons */
.btn-primary,
.btn-secondary {
    display: inline-block;
    padding: 12px 32px;
    border-radius: 50px;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 1px;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--text-light);
    /* Assuming used on dark overlay mostly */
    border: 2px solid var(--text-light);
    margin-left: 1rem;
}

.btn-secondary:hover {
    background-color: var(--text-light);
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-sm) 0;
    transition: var(--transition);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo img {
    height: 60px;
    width: auto;
}

.logo-text h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
    line-height: 1.1;
    font-family: var(--font-body);
    /* More readable for logo text small */
    font-weight: 700;
    letter-spacing: -0.5px;
}

.tagline {
    font-size: 0.75rem;
    color: var(--secondary-color);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
}

.nav-list {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-list a {
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-dark);
}

.nav-list a:hover {
    color: var(--primary-color);
}

.nav-list .btn-primary {
    padding: 8px 24px;
    font-size: 0.85rem;
}

.mobile-menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    height: 100vh;
    width: 100%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    /* Fallback or nice blue gradient */
    /* Add a subtle pattern or image if available later */
    background-image: url('https://images.unsplash.com/photo-1532094349884-543bc11b234d?auto=format&fit=crop&q=80&w=2000');
    /* Science/Lab placeholder from Unsplash */
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: white;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(15, 76, 92, 0.9), rgba(15, 76, 92, 0.7));
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 800px;
}

.hero-subtitle {
    display: block;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-weight: 600;
}

.hero-title {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.25rem;
    margin-bottom: 2.5rem;
    opacity: 0.9;
    font-weight: 300;
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    opacity: 0.8;
    z-index: 2;
}

.scroll-indicator span {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.mouse {
    width: 26px;
    height: 40px;
    border: 2px solid white;
    border-radius: 20px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: white;
    border-radius: 2px;
    animation: scrollMouse 2s infinite;
}

@keyframes scrollMouse {
    0% {
        transform: translate(-50%, 0);
        opacity: 1;
    }

    100% {
        transform: translate(-50%, 15px);
        opacity: 0;
    }
}

/* Section Header Styles */
.section-tag {
    display: block;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.section-title {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.light-text .section-title {
    color: white;
}

.title-underline {
    width: 60px;
    height: 3px;
    background-color: var(--secondary-color);
    margin: 0 auto 3rem auto;
}

.title-underline.left-align {
    margin: 0 0 2rem 0;
}

/* Vision Section */
.vision-section {
    position: relative;
}

.vision-card {
    background: white;
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border-left: 5px solid var(--secondary-color);
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.vision-text {
    font-size: 1.5rem;
    font-family: var(--font-heading);
    color: var(--text-dark);
    font-style: italic;
    line-height: 1.6;
}

/* Pillars Section */
.pillars-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.pillar-card {
    background: white;
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border-top: 4px solid transparent;
}

.pillar-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
    border-top: 4px solid var(--primary-color);
}

.pillar-icon {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 1.5rem;
}

.pillar-card h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.pillar-card p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.collaborations {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid #eee;
}

.collaborations h4 {
    font-size: 0.9rem;
    text-transform: uppercase;
    margin-bottom: 0.8rem;
    color: var(--text-dark);
}

.collaborations ul li {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.collaborations ul li i {
    color: var(--primary-color);
}

/* Ecosystem */
.row {
    display: flex;
    flex-wrap: wrap;
    gap: 3rem;
}

.col-half {
    flex: 1;
    min-width: 300px;
}

.align-center {
    align-items: center;
}

.ecosystem-list {
    margin-top: 2rem;
}

.ecosystem-list li {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    font-weight: 500;
}

.ecosystem-list li i {
    color: var(--secondary-color);
    font-size: 1.2rem;
    width: 25px;
    text-align: center;
}

.ecosystem-visual {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.visual-card {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: var(--radius-md);
    text-align: center;
    transition: var(--transition);
}

.visual-card:hover {
    background: var(--primary-color);
    color: white;
    transform: scale(1.05);
}

.visual-card:hover i {
    color: white;
}

.visual-card i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    transition: var(--transition);
}

.visual-card h4 {
    font-size: 1rem;
    font-weight: 600;
}

/* People Section */
.people-intro {
    font-size: 1.2rem;
    max-width: 800px;
    margin: 0 auto 3rem auto;
    color: rgba(255, 255, 255, 0.8);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.focus-item {
    padding: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.focus-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
}

.focus-item i {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.focus-item span {
    display: block;
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
}

.people-outro {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--secondary-color);
    font-style: italic;
}

/* Leadership Section */
.leadership-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
}

.member-card {
    background: white;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.member-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-5px);
}

.member-photo-placeholder {
    height: 250px;
    background: #e0e0e0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.member-photo {
    height: 300px;
    overflow: hidden;
    background: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
}

.member-photo img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: bottom;
}

.member-photo-placeholder i {
    font-size: 5rem;
    color: #ccc;
}

.member-info {
    padding: 1.5rem;
    text-align: center;
}

.member-info h3 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
    /* Adjusted for longer names */
}

.designation {
    display: block;
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.sub-designation {
    display: block;
    font-size: 0.8rem;
    color: var(--secondary-color);
    font-style: italic;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.member-contact a {
    display: block;
    font-size: 0.85rem;
    color: var(--text-dark);
    margin-bottom: 0.3rem;
}

.member-contact a:hover {
    color: var(--primary-color);
}

.member-contact i {
    color: var(--secondary-color);
    margin-right: 5px;
    width: 15px;
}

/* Footer */
.footer {
    background: #092c35;
    color: white;
    padding: 4rem 0 0 0;
}

.footer-top {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    flex: 1;
    min-width: 250px;
}

.footer-logo {
    height: 50px;
    margin-bottom: 1rem;
    filter: brightness(0) invert(1);
    /* Make logo white if PNG allows, else remove filter */
}

.footer-brand h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
}

.footer-links h4,
.footer-contact h4 {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--secondary-color);
}

.footer-links ul li {
    margin-bottom: 0.8rem;
}

.footer-links ul li a {
    color: rgba(255, 255, 255, 0.8);
}

.footer-links ul li a:hover {
    color: var(--secondary-color);
    padding-left: 5px;
}

.footer-contact p {
    margin-bottom: 0.8rem;
    color: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-contact i {
    color: var(--secondary-color);
}

.footer-bottom {
    padding: 1.5rem 0;
    text-align: center;
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.9rem;
}

/* Animations */
.fade-in-up,
.fade-in-left,
.fade-in-right {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.fade-in-left {
    transform: translateX(-30px);
}

.fade-in-right {
    transform: translateX(30px);
}

.fade-in-up.visible,
.fade-in-left.visible,
.fade-in-right.visible {
    opacity: 1;
    transform: translate(0);
}

.delay-100 {
    transition-delay: 0.1s;
}

.delay-200 {
    transition-delay: 0.2s;
}

/* Responsive */
@media (max-width: 900px) {
    .btn-secondary {
        margin-left: 0;
        margin-top: 1rem;
        display: block;
        text-align: center;
    }

    .hero-buttons .btn-primary,
    .hero-buttons .btn-secondary {
        width: 100%;
        max-width: 300px;
        margin: 0.5rem auto;
        display: block;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .logo-text {
        display: none;
    }

    /* Show only graphical logo on small mobile if needed, or scale down */
}

@media (max-width: 768px) {
    .header-container {
        padding: 0 var(--spacing-sm);
    }

    .nav-list {
        display: none;
        /* simple hide for now, would need JS toggle */
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        padding: 1rem;
        box-shadow: var(--shadow-md);
    }

    .nav-list.active {
        display: flex;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .row {
        flex-direction: column;
        gap: 2rem;
    }
}

@media (min-width: 901px) {
    .logo-text {
        display: block;
    }
}