:root {
    /* Sophisticated National Palette */
    --primary-green: #005a41;     /* Deep Emerald National Green */
    --accent-green: #007c5a;      /* Lighter professional green */
    --primary-red: #d92134;       /* Balanced ruby red */
    --soft-red: #fff1f2;          /* Very light red background */
    --neutral-black: #0f172a;     /* Professional dark text */
    --neutral-gray: #475569;      /* Muted text */
    --bg-main: #ffffff;           /* Clean white */
    --bg-alt: #f1f5f9;            /* Subtle section contrast */
    --border-soft: #e2e8f0;       /* Fine UI borders */
    
    /* Typography */
    --font-bn: 'Hind Siliguri', sans-serif;
    --font-en: 'Outfit', sans-serif;
    
    /* Layout */
    --container-max: 1100px;
}

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

body {
    background-color: var(--bg-main);
    color: var(--neutral-black);
    font-family: var(--font-bn);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
}

/* --- Top Bar (Official Look) --- */
.top-bar {
    background: var(--neutral-black);
    color: #fff;
    padding: 0.5rem 0;
    font-size: 0.85rem;
    font-family: var(--font-en);
}

.top-bar-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* --- Navigation --- */
nav {
    padding: 1rem 0;
    background: #fff;
    border-bottom: 3px solid var(--primary-green);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    text-decoration: none;
    font-weight: 800;
    font-size: 1.8rem;
    color: var(--primary-green);
    letter-spacing: -0.5px;
}

/* Desktop Nav Links */
.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--neutral-gray);
    font-weight: 500;
    transition: color 0.3s;
}

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

/* Hamburger Menu Button */
.burger {
    display: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}

.burger div {
    width: 25px;
    height: 3px;
    background-color: var(--primary-green);
    transition: all 0.3s ease;
}

/* --- Hero Section --- */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, rgba(0, 90, 65, 0.02) 0%, rgba(217, 33, 52, 0.02) 100%);
    text-align: center;
}

.hero-content {
    max-width: 850px;
    margin: 0 auto;
}

.hero-title {
    font-size: 4.5rem;
    color: var(--primary-green);
    line-height: 1.1;
    margin-bottom: 2rem;
    font-weight: 800;
}

.hero-title .highlight-red {
    color: var(--primary-red);
}

.hero-description {
    font-size: 1.35rem;
    color: var(--neutral-gray);
    margin-bottom: 3rem;
    line-height: 1.6;
}

/* --- Structured Content Sections --- */
.section { padding: 90px 0; }
.section-alt { background: var(--bg-alt); }

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    color: var(--primary-green);
    position: relative;
    display: inline-block;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 20%;
    width: 60%;
    height: 4px;
    background: var(--primary-red);
}

/* Feature Cards Grid */
.card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
}

.card {
    background: #fff;
    padding: 3rem 2rem;
    border-radius: 20px;
    border: 1px solid var(--border-soft);
    transition: all 0.3s ease;
    text-align: center;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-green);
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    display: inline-block;
}

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

.card p {
    color: var(--neutral-gray);
    font-size: 1.05rem;
}

/* Mission Blockquote */
.mission-callout {
    background: var(--primary-green);
    color: #fff;
    padding: 80px 40px;
    border-radius: 40px;
    position: relative;
    overflow: hidden;
    margin: 40px 0;
}

.mission-callout::before {
    content: '“';
    position: absolute;
    top: -20px;
    left: 40px;
    font-size: 15rem;
    opacity: 0.1;
    font-family: var(--font-en);
}

.mission-text {
    font-size: 2.2rem;
    font-weight: 700;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.3;
}

.mission-sub {
    font-family: var(--font-en);
    font-style: italic;
    font-size: 1.1rem;
    margin-top: 20px;
    opacity: 0.8;
}

/* Visual Components */
.visual-frame {
    border-radius: 30px;
    overflow: hidden;
    border: 10px solid #fff;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.2);
}

.visual-frame img {
    width: 100%;
    display: block;
}

/* --- Footer --- */
footer {
    padding: 80px 0 40px;
    background: #fff;
    border-top: 1px solid var(--border-soft);
    text-align: center;
}

.footer-logo {
    text-decoration: none;
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-green);
    display: block;
    margin-bottom: 2rem;
}

.footer-nav {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-bottom: 2.5rem;
    list-style: none;
}

.footer-nav a {
    text-decoration: none;
    color: var(--neutral-gray);
    font-weight: 500;
    transition: color 0.3s;
}

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

.copy-text {
    color: var(--neutral-gray);
    font-size: 0.9rem;
    opacity: 0.7;
}

/* Animations */
[data-animate] {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-animate].visible {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Scaling */
@media (max-width: 1024px) {
    .card-grid { grid-template-columns: repeat(2, 1fr); }
    .hero-title { font-size: 3.5rem; }
}

@media (max-width: 768px) {
    /* Mobile Nav */
    .burger { display: flex; }
    
    .nav-links {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: #fff;
        flex-direction: column;
        align-items: center;
        padding: 2rem 0;
        gap: 1.5rem;
        box-shadow: 0 10px 15px rgba(0,0,0,0.1);
        transform: translateY(-20px);
        opacity: 0;
        pointer-events: none;
        transition: all 0.3s ease;
        border-bottom: 2px solid var(--primary-green);
    }

    .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    /* Burger Animation */
    .toggle .line1 { transform: rotate(-45deg) translate(-5px, 6px); }
    .toggle .line2 { opacity: 0; }
    .toggle .line3 { transform: rotate(45deg) translate(-5px, -6px); }

    /* Layout Adjustments */
    .hero { padding: 80px 0 40px; }
    .hero-title { font-size: 2.5rem; }
    .hero-description { font-size: 1.1rem; }
    
    .section { padding: 60px 0; }
    .description-grid { grid-template-columns: 1fr; gap: 3rem; }
    
    .card-grid { grid-template-columns: 1fr; }
    .mission-callout { padding: 60px 20px; border-radius: 25px; }
    .mission-text { font-size: 1.5rem; }

    .container { padding: 0 1.5rem; }
    
    .top-bar-flex { flex-direction: column; gap: 0.5rem; text-align: center; font-size: 0.75rem; }
}