/* ==========================================================================
   1. CORE ARCHITECTURE & DESIGN SYSTEM CONFIGURATION (2026 SPEC)
   ========================================================================== */
:root {
    /* Color Palette - AAA Accessibility Compliant Contrast Tones */
    --primary-deep: #1b6623;       /* Deep Forest Green */
    --primary-leaf: #40a040;       /* Vibrant Leaf Green */
    --accent-mint: #e8f5e9;        /* Soft Sage Tint tint */
    --neutral-dark: #111827;       /* Charcoal Black Text */
    --neutral-slate: #4b5563;      /* Muted Subtitles */
    --surface-light: #f8fafc;      /* Background Off-White */
    --surface-white: #ffffff;      /* Pure Card Background */
    --accent-orange: #ea580c;     /* Upcoming Action Badge Alert */
    
    /* Layout Constants */
    --max-width: 1280px;
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
    
    /* High-Performance Transitions */
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease;
}

/* Base Engine Resets */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--surface-light);
    color: var(--neutral-dark);
    line-height: 1.6;
    font-size: 16px;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

/* Global Container Utility */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin-right: auto;
    margin-left: auto;
    padding-right: 1.5rem;
    padding-left: 1.5rem;
}

/* Layout Helper Utilities */
.grid-two-columns {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .grid-two-columns {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ==========================================================================
   2. ACCESSIBILITY TICKER & BRANDING HEADER PANELS
   ========================================================================== */
.top-announcement-bar {
    background-color: var(--primary-deep);
    color: var(--surface-white);
    font-size: 0.75rem;
    padding: 0.6rem 0;
    font-weight: 500;
}

.system-flex-between {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    text-align: center;
}

@media (min-width: 640px) {
    .system-flex-between {
        flex-direction: row;
        justify-content: space-between;
    }
}

.contact-meta-left {
    display: flex;
    gap: 1.5rem;
}

.desktop-only {
    display: none;
}

@media (min-width: 768px) {
    .desktop-only {
        display: inline;
    }
}

.email-link {
    color: var(--surface-white);
    text-decoration: none;
    font-weight: 600;
}

.email-link:hover {
    text-decoration: underline;
}

.badge-tag {
    background-color: var(--primary-leaf);
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    text-transform: uppercase;
    font-weight: 900;
    font-size: 0.65rem;
    letter-spacing: 0.05em;
}

/* Main Institutional Branding Crest */
.main-branding-header {
    background-color: var(--surface-white);
    padding: 2rem 0;
    border-bottom: 1px solid #e2e8f0;
}

.header-grid {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    text-align: center;
}

@media (min-width: 768px) {
    .header-grid {
        flex-direction: row;
        text-align: left;
    }
}

.branding-logo-wrapper {
    background-color: var(--accent-mint);
    padding: 0.5rem;
    border-radius: 50%;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.06);
    display: flex;
    align-items: center;
    justify-content: center;
}

.institute-logo {
    object-fit: contain;
    border-radius: 50%;
}

.branding-text-group .institute-title {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--primary-deep);
    text-transform: uppercase;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

@media (min-width: 1024px) {
    .branding-text-group .institute-title {
        font-size: 2.25rem;
    }
}

.institute-tagline {
    color: var(--primary-leaf);
    font-weight: 500;
    font-style: italic;
    margin-top: 0.4rem;
    font-size: 0.9rem;
}

/* ==========================================================================
   3. STICKY INTERACTIVE NAVIGATION SYSTEM
   ========================================================================== */
.main-navigation-bar {
    background-color: var(--surface-white);
    border-bottom: 1px solid #f1f5f9;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
    display: none; /* Accessible toggle via CSS media triggers */
}

@media (min-width: 768px) {
    .main-navigation-bar {
        display: block;
    }
}

.navigation-flex {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    padding: 0.75rem 0;
}

.nav-item {
    color: var(--neutral-slate);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.35rem 0.5rem;
    transition: var(--transition-fast);
}

.nav-item:hover, .nav-item.active {
    color: var(--primary-deep);
}

.nav-item.event-highlight-btn {
    background-color: var(--primary-deep);
    color: var(--surface-white);
    border-radius: 9999px;
    padding: 0.35rem 1rem;
}

.nav-item.event-highlight-btn:hover {
    background-color: var(--primary-leaf);
}

/* ==========================================================================
   4. HARDWARE ACCELERATED HERO SLIDER CAROUSEL
   ========================================================================== */
.hero-slider-section {
    position: relative;
    width: 100%;
    height: 400px;
    background-color: #000;
    overflow: hidden;
}

@media (min-width: 768px) {
    .hero-slider-section {
        height: 520px;
    }
}

.slider-viewport {
    width: 100%;
    height: 100%;
    position: relative;
}

.slide-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    z-index: 1;
    /* Hardware acceleration layer optimization mapping */
    transform: translateZ(0);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.slide-item.active {
    opacity: 1;
    z-index: 2;
}

.slider-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: brightness(0.55);
}

.slide-caption-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 4rem 0;
    background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0) 100%);
    color: var(--surface-white);
    z-index: 3;
}

.slide-heading {
    font-size: 1.75rem;
    font-weight: 900;
    letter-spacing: -0.03em;
}

@media (min-width: 768px) {
    .slide-heading {
        font-size: 3rem;
    }
}

.slide-subtext {
    font-size: 1rem;
    color: rgba(255,255,255,0.85);
    margin-top: 0.5rem;
    max-width: 600px;
}

/* Slider Controls */
.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.3);
    color: var(--surface-white);
    border: none;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 10;
    font-size: 1.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.slider-arrow:hover {
    background: var(--primary-leaf);
}

.prev-arrow { left: 1rem; }
.next-arrow { right: 1rem; }

.slider-dots-container {
    position: absolute;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    display: flex;
    gap: 0.5rem;
}

.dot {
    width: 10px;
    height: 10px;
    background-color: rgba(255,255,255,0.4);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.dot.active, .dot:hover {
    background-color: var(--primary-leaf);
    width: 24px;
    border-radius: 5px;
}

/* ==========================================================================
   5. MAIN ENGINE ARCHITECTURE COMPONENTS
   ========================================================================== */
.main-content-engine {
    margin-top: 4rem;
    margin-bottom: 4rem;
    display: flex;
    flex-direction: column;
    gap: 6rem;
}

/* Generic Layout Panel Modifiers */
.card-panel {
    padding: 2.5rem;
    border-radius: var(--border-radius-md);
}

.identity-gradient {
    background: linear-gradient(135deg, var(--surface-white) 0%, var(--accent-mint) 100%);
    border: 1px solid #e2e8f0;
}

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

.border-slate {
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.02);
}

.section-title {
    font-size: 1.5rem;
    font-weight: 800;
    text-transform: uppercase;
    color: var(--primary-deep);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

.section-title.border-green {
    border-bottom: 2px solid rgba(64, 160, 64, 0.2);
}

.body-text {
    color: var(--neutral-slate);
    font-size: 1rem;
    line-height: 1.7;
}

.spacer-top-lg { margin-top: 2.5rem; }

/* Values Matrix Framework */
.values-matrix-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    list-style: none;
}

@media (min-width: 640px) {
    .values-matrix-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.matrix-item {
    background-color: var(--surface-light);
    padding: 1rem;
    border-radius: var(--border-radius-sm);
    border-left: 4px solid var(--primary-deep);
}

.matrix-item strong {
    display: block;
    color: var(--primary-deep);
    font-size: 0.95rem;
}

.text-muted { color: var(--neutral-slate); font-size: 0.85rem; }
.block { display: block; }

/* ==========================================================================
   6. SERVICES & RESEARCH MATRICES
   ========================================================================== */
.section-center-heading {
    text-align: center;
    max-width: 600px;
    margin: 0 auto 3rem auto;
}

.section-headline-main {
    font-size: 2rem;
    font-weight: 900;
    color: var(--primary-deep);
    text-transform: uppercase;
    letter-spacing: -0.01em;
}

.accent-line-center {
    height: 4px;
    width: 64px;
    background-color: var(--primary-leaf);
    margin: 0.75rem auto 0 auto;
    border-radius: var(--border-radius-sm);
}

.matrix-three-columns {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 768px) {
    .matrix-three-columns {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .matrix-three-columns {
        grid-template-columns: repeat(3, 1fr);
    }
}

.theme-card {
    background-color: var(--surface-white);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    border: 1px solid #e2e8f0;
    transition: var(--transition-smooth);
}

.theme-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 20px -3px rgba(0, 0, 0, 0.05);
}

.card-banner-placeholder {
    height: 180px;
    background-color: #cbd5e1;
    overflow: hidden;
}

.card-banner-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card-body {
    padding: 1.5rem;
}

.card-header-title {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary-deep);
    margin-bottom: 1rem;
    line-height: 1.4;
}

.bullet-feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--neutral-slate);
}

/* ==========================================================================
   7. OUTREACH & INTERNATIONAL ALLIANCES
   ========================================================================== */
.institutional-impact-banner {
    background: linear-gradient(135deg, var(--primary-deep) 0%, #064e3b 100%);
    color: var(--surface-white);
    border-radius: var(--border-radius-lg);
    padding: 3rem 1.5rem;
}

@media (min-width: 768px) {
    .institutional-impact-banner {
        padding: 5rem;
    }
}

.impact-content-container {
    max-width: 900px;
    margin: 0 auto;
}

.pill-announcement-dark {
    background-color: rgba(64, 160, 64, 0.3);
    border: 1px solid rgba(255,255,255,0.1);
    padding: 0.35rem 0.85rem;
    border-radius: 9999px;
    font-size: 0.7rem;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.05em;
    display: inline-block;
}

.impact-heading {
    font-size: 2rem;
    font-weight: 900;
    margin-top: 1rem;
    margin-bottom: 1.5rem;
}

.impact-description {
    color: #d1fae5;
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 3rem;
}

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

@media (min-width: 768px) {
    .impact-gallery-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.gallery-frame {
    height: 150px;
    background-color: rgba(255,255,255,0.1);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
}

.gallery-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.gallery-frame:hover img {
    transform: scale(1.05);
}

/* ==========================================================================
   8. KNOWLEDGE SHARING PIPELINES
   ========================================================================== */
.interactive-sessions-card {
    background-color: var(--surface-white);
    padding: 2.5rem;
    border-radius: var(--border-radius-md);
    border: 1px solid #e2e8f0;
}

.sessions-header {
    border-bottom: 1px solid #e2e8f0;
    padding-bottom: 1.5rem;
    margin-bottom: 2.5rem;
}

.subtext-muted {
    color: var(--neutral-slate);
    font-size: 0.95rem;
    margin-top: 0.25rem;
}

.gap-md { gap: 2rem; }

.webinar-node {
    background-color: var(--surface-light);
    border: 1px solid #e2e8f0;
    padding: 2rem;
    border-radius: var(--border-radius-sm);
    display: flex;
    flex-direction: column;
}

.webinar-status-pill {
    align-self: flex-start;
    background-color: #ffedd5;
    color: var(--accent-orange);
    font-size: 0.75rem;
    font-weight: 700;
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}

.webinar-title {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--neutral-dark);
    line-height: 1.4;
}

.webinar-meta {
    font-size: 0.85rem;
    margin-top: 0.5rem;
    color: var(--neutral-slate);
}

.webinar-body {
    font-size: 0.9rem;
    color: var(--neutral-slate);
    margin-top: 1rem;
    flex-grow: 1; /* Aligns footer bars cleanly */
}

.webinar-footer-bar {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #e2e8f0;
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--neutral-slate);
}

.platform-alert { color: var(--primary-deep); }

/* ==========================================================================
   9. EVENT FEATURE MARKETING ENGINE (IMD 2026 HUB)
   ========================================================================== */
.international-event-glowbox {
    background-color: rgba(232, 245, 233, 0.4);
    border: 2px solid rgba(27, 102, 35, 0.15);
    border-radius: var(--border-radius-lg);
    padding: 2.5rem;
    position: relative;
}

@media (min-width: 768px) {
    .international-event-glowbox {
        padding: 4rem;
    }
}

.event-structural-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

@media (min-width: 1024px) {
    .event-structural-grid {
        grid-template-columns: 2fr 1fr;
        align-items: center;
    }
}

.authority-badge-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.authority-badge {
    background-color: var(--primary-deep);
    color: var(--surface-white);
    font-size: 0.65rem;
    font-weight: 800;
    padding: 0.25rem 0.6rem;
    border-radius: 9999px;
    text-transform: uppercase;
}

.authority-sub {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--neutral-slate);
}

.event-main-heading {
    font-size: 2.25rem;
    font-weight: 900;
    color: var(--neutral-dark);
    letter-spacing: -0.02em;
}

.accent-green-text { color: var(--primary-deep); }

.event-theme-sub {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--primary-leaf);
    font-style: italic;
    margin-top: 0.5rem;
    line-height: 1.4;
}

.event-abstract {
    font-size: 0.95rem;
    color: var(--neutral-slate);
    margin-top: 1rem;
}

.event-logistics-bar {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.5rem;
    margin-top: 2rem;
}

@media (min-width: 640px) {
    .event-logistics-bar {
        grid-template-columns: repeat(3, 1fr);
    }
}

.logistics-item {
    background-color: var(--surface-white);
    border: 1px solid #e2e8f0;
    padding: 0.75rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
    text-align: center;
}

/* Event Actions Panel Card */
.registration-action-card {
    background-color: var(--surface-white);
    border: 1px solid #e2e8f0;
    padding: 2rem;
    border-radius: var(--border-radius-md);
    box-shadow: 0 20px 25px -5px rgba(0,0,0,0.04);
}

.action-card-title {
    font-size: 1.15rem;
    font-weight: 800;
    text-align: center;
}

.action-card-sub {
    font-size: 0.75rem;
    color: var(--neutral-slate);
    text-align: center;
    margin-bottom: 1.5rem;
}

.benefits-checklist {
    background-color: var(--surface-light);
    padding: 1rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    color: var(--neutral-slate);
    margin-bottom: 1.5rem;
}

.primary-conversion-btn {
    display: block;
    width: 100%;
    text-align: center;
    background-color: var(--primary-deep);
    color: var(--surface-white);
    text-decoration: none;
    font-weight: 700;
    padding: 1rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-smooth);
}

.primary-conversion-btn:hover {
    background-color: var(--primary-leaf);
    transform: translateY(-1px);
}

/* ==========================================================================
   10. SYSTEM CONTACT PANELS
   ========================================================================== */
.contact-directory-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.directory-node strong {
    display: block;
    font-size: 0.9rem;
    color: var(--neutral-dark);
}

.directory-node p {
    font-size: 0.95rem;
    color: var(--neutral-slate);
    margin-top: 0.2rem;
}

.text-link-green {
    color: var(--primary-deep);
    text-decoration: none;
    font-weight: 600;
}

.mb-md { margin-bottom: 1rem; }

.flex-center-content {
    display: flex;
    align-items: center;
    justify-content: center;
}

.form-redirect-box {
    text-align: center;
    max-width: 320px;
}

.form-icon-graphic {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.form-redirect-box h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.secondary-form-btn {
    display: inline-block;
    margin-top: 1.5rem;
    background-color: transparent;
    border: 2px solid var(--primary-deep);
    color: var(--primary-deep);
    text-decoration: none;
    font-weight: 700;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius-sm);
    transition: var(--transition-fast);
}

.secondary-form-btn:hover {
    background-color: var(--primary-deep);
    color: var(--surface-white);
}

/* ==========================================================================
   11. FOOTER PIPELINE SYSTEMS
   ========================================================================== */
.global-terminal-footer {
    background-color: var(--neutral-dark);
    color: #9ca3af;
    font-size: 0.75rem;
    padding: 4rem 0;
    margin-top: auto;
    border-top: 1px solid #1f2937;
}

.footer-structural-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

@media (min-width: 768px) {
    .footer-structural-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.footer-column {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-header {
    color: var(--surface-white);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-copyright {
    color: #4b5563;
    margin-top: auto;
}

.footer-tags {
    line-height: 1.8;
}

/* ==========================================================================
   12. SEARCH ENGINE OPTIMIZATION SCROLL CORRECTIONS
   ========================================================================== */
.scroll-target {
    scroll-margin-top: 6rem;
}