/* ---------------------------------
   1. ROOT & VARIABLES
   ---------------------------------
*/
:root {
    --color-background: #0A0A0A; /* Very dark grey, not pure black */
    --color-surface: #121212;  /* Slightly lighter for cards/surfaces */
    --color-primary: #00BFFF;   /* Electric/Deep Sky Blue */
    --color-primary-dark: #0099CC;
    --color-text: #E0E0E0;      /* Light grey for body text */
    --color-heading: #FFFFFF;   /* Pure white for headings */
    --color-border: #222222;    /* Subtle border color */

    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --transition-fast: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ---------------------------------
   2. GLOBAL RESET & SETUP
   ---------------------------------
*/
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-background);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden; /* Prevents horizontal scroll from animations */
}

main {
    width: 100%;
    margin: 0 auto;
}

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

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

a:hover {
    color: var(--color-primary-dark);
}

h1, h2, h3, h4, h5, h6 {
    color: var(--color-heading);
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.3;
}

h1 { font-size: 3.5rem; font-weight: 900; }
h2 { font-size: 2.5rem; text-align: center; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.25rem; }

.content-section {
    max-width: 1100px;
    margin: 0 auto;
    padding: 6rem 2rem;
    border-bottom: 1px solid var(--color-border);
}

.section-title {
    margin-bottom: 1rem;
    position: relative;
}
.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--color-primary);
    margin: 1rem auto 0;
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.1rem;
    color: #aaa;
    max-width: 600px;
    margin: 0 auto 3rem auto;
}

.cta-button {
    display: inline-block;
    background: var(--color-primary);
    color: var(--color-background);
    padding: 0.75rem 1.5rem;
    border-radius: 5px;
    font-weight: 500;
    transition: var(--transition-fast);
    border: 2px solid var(--color-primary);
}

.cta-button:hover {
    background: transparent;
    color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 191, 255, 0.1);
}

/* ---------------------------------
   3. HEADER & NAVIGATION
   ---------------------------------
*/
#main-header {
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1000;
    padding: 1.5rem 2rem;
    background: rgba(10, 10, 10, 0.7);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition-fast);
}
#main-header.scrolled {
    background: rgba(10, 10, 10, 0.9);
    padding: 1rem 2rem;
}
#main-header nav {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}
.logo img {
    height: 40px;
    width: auto;
}
.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
}
.nav-links li {
    margin-left: 2rem;
}
.nav-links a {
    color: var(--color-text);
    font-weight: 500;
    position: relative;
}
.nav-links a::after {
    content: '';
    display: block;
    height: 2px;
    width: 0;
    background: var(--color-primary);
    position: absolute;
    bottom: -5px;
    left: 0;
    transition: var(--transition-fast);
}
.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}
.nav-links .cta-button {
    color: var(--color-background);
    padding: 0.5rem 1rem;
    margin-left: 2rem;
}
.nav-links .cta-button:hover {
    color: var(--color-primary);
}
.nav-links .cta-button::after {
    display: none;
}

/* ---------------------------------
   4. SECTION: HERO
   ---------------------------------
*/
#hero {
    height: 100vh;
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    padding: 0 2rem;
    background-color: var(--color-background);
    overflow: hidden;
}
#particles-js {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}
.hero-content {
    position: relative;
    z-index: 3;
    max-width: 800px;
}
#hero h1 {
    font-size: 4.5rem;
    margin-bottom: 1.5rem;
}
#hero .highlight {
    color: var(--color-primary);
}
#hero p {
    font-size: 1.25rem;
    color: var(--color-text);
    margin-bottom: 2rem;
}

/* ---------------------------------
   5. SECTION: ABOUT
   ---------------------------------
*/
.about-container {
    text-align: center;
}
.about-text {
    max-width: 800px;
    margin: 0 auto;
}
.about-text h3 {
    margin-bottom: 2rem;
    font-size: 1.75rem;
}
.about-text p {
    font-size: 1.15rem;
    line-height: 1.8;
    color: var(--color-text);
    margin-bottom: 2rem;
}
.about-text .highlight {
    color: var(--color-primary);
    font-weight: 600;
}

.about-stats {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}
.stat-item {
    background: var(--color-surface);
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--color-primary);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    text-align: left;
    flex: 1;
    min-width: 250px;
}
.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-primary);
}
.stat-label {
    font-size: 1rem;
    color: var(--color-text);
}

/* ---------------------------------
   6. SECTION: EVENTS & PROJECTS (Card Layout)
   ---------------------------------
*/
.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}
.event-card {
    background: var(--color-surface);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: var(--transition-slow);
    border: 1px solid var(--color-border);
}
.event-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    filter: grayscale(30%);
    transition: var(--transition-fast);
}
.event-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 191, 255, 0.1);
}
.event-card:hover img {
    filter: grayscale(0%);
}
.card-content {
    padding: 1.5rem;
}
.card-content h4 {
    color: var(--color-primary);
}
.project-card {
    background: transparent;
    border: 1px solid var(--color-border);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    transition: var(--transition-slow);
}
.project-card:hover {
    background: var(--color-surface);
    border-color: var(--color-primary);
    transform: translateY(-10px);
}
.project-icon {
    height: 60px;
    width: 60px;
    margin: 0 auto 1.5rem auto;
    filter: invert(60%) sepia(100%) saturate(1500%) hue-rotate(160deg) brightness(100%) contrast(100%);
}
.project-card h4 {
    color: var(--color-heading);
    margin-bottom: 0.5rem;
}
.section-cta-button {
    text-align: center;
    margin-top: 3rem;
}

/* ---------------------------------
   7. SECTION: TEAM
   ---------------------------------
*/
.team-tier-title {
    text-align: center;
    color: var(--color-primary);
    font-weight: 500;
    margin-top: 4rem;
    margin-bottom: -1rem;
}
.team-tier-title:first-of-type {
    margin-top: 0;
}
.team-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 2rem;
    text-align: center;
    margin-top: 3rem;
}
.managers-grid {
    gap: 3rem;
}
.team-card {
    display: block;
    color: var(--color-text);
    perspective: 1000px;
}
.team-card-inner {
    position: relative;
    width: 220px;
    height: 220px;
    transition: transform 0.7s, box-shadow 0.3s;
    transform-style: preserve-3d;
    margin-bottom: 1.25rem;
    border-radius: 50%;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}
.convenors-grid .team-card-inner {
    width: 180px;
    height: 180px;
}
.team-card:hover .team-card-inner {
    transform: rotateY(180deg);
    box-shadow: 0 10px 30px rgba(0, 191, 255, 0.2);
}
.team-card-front,
.team-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 50%;
    overflow: hidden;
}
.team-card-front img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-fast);
}
.team-card-back {
    background-color: var(--color-primary);
    color: var(--color-background);
    transform: rotateY(180deg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.team-card-back h4 {
    color: var(--color-background);
    font-size: 1.1rem;
    margin-top: 0.5rem;
}
.convenors-grid .team-card-back h4 {
    display: none;
}
.team-info {
    transition: transform 0.3s ease;
}
.team-card:hover .team-info {
    transform: translateY(-5px);
}
.team-info h5 {
    color: var(--color-heading);
    font-size: 1.2rem;
    margin-bottom: 0.25rem;
}
.convenors-grid .team-info h5 {
    font-size: 1.1rem;
}
.team-info span {
    color: var(--color-primary);
    font-size: 0.9rem;
}

/* ---------------------------------
   8. SECTION: CONTACT FORM
   ---------------------------------
*/
#contact-form {
    max-width: 800px;
    margin: 3rem auto 0;
}
.form-row {
    display: flex;
    gap: 2rem;
    margin-bottom: 1.5rem;
}
.form-group {
    flex: 1;
    margin-bottom: 1.5rem;
}
.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--color-text);
}
.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 5px;
    color: var(--color-heading);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: var(--transition-fast);
}
.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 191, 255, 0.2);
}
.form-group textarea {
    resize: vertical;
}
.form-submit {
    text-align: center;
}

/* ---------------------------------
   9. FOOTER
   ---------------------------------
*/
footer {
    padding: 3rem 2rem;
    background: var(--color-surface);
}
.footer-content {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.footer-left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}
.footer-logo {
    height: 60px;
    opacity: 0.7;
    flex-shrink: 0;
}
.footer-left p {
    font-size: 0.9rem;
    color: #888;
    margin: 0;
}
.footer-right a {
    color: #888;
    margin-left: 1.5rem;
}
.footer-right a:hover {
    color: var(--color-primary);
}
.footer-right svg {
    width: 24px;
    height: 24px;
}

/* ---------------------------------
   10. UTILITIES
   ---------------------------------
*/
#back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: var(--color-primary);
    color: var(--color-background);
    text-align: center;
    line-height: 40px;
    font-size: 1.5rem;
    border-radius: 50%;
    z-index: 500;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-fast);
}
#back-to-top.visible {
    opacity: 1;
    visibility: visible;
}
.animate-on-load {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 0.8s ease forwards;
}
.hero-content p { animation-delay: 0.2s; }
.hero-content .cta-button { animation-delay: 0.4s; }
@keyframes fadeIn {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}
.card-container .animate-on-scroll:nth-child(2) { transition-delay: 0.1s; }
.card-container .animate-on-scroll:nth-child(3) { transition-delay: 0.2s; }
.team-grid .animate-on-scroll:nth-child(2) { transition-delay: 0.1s; }
.team-grid .animate-on-scroll:nth-child(3) { transition-delay: 0.2s; }
.team-grid .animate-on-scroll:nth-child(4) { transition-delay: 0.3s; }

/* ---------------------------------
   12. EVENTS PAGE
   ---------------------------------
*/
#events-archive {
    padding-top: 10rem;
    min-height: 100vh;
}
.page-title {
    font-size: 3rem;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--color-primary);
}
.page-title + .section-subtitle {
    margin-bottom: 4rem;
}
.events-page-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1.5rem;
}
.event-card-link {
    display: block;
    text-decoration: none;
    background: var(--color-surface);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    height: 100%;
}
.event-card-link:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0, 191, 255, 0.15);
}
.event-card-link img {
    height: 140px;
    width: 100%;
    object-fit: cover;
    transition: filter 0.4s ease;
}
.event-card-link:hover img {
    filter: brightness(1.1);
}
.event-card-link .card-content {
    padding: 1.25rem;
}
.event-card-link h4 {
    font-size: 1.1rem;
    color: var(--color-heading);
    transition: color 0.3s ease;
}
.event-card-link:hover h4 {
    color: var(--color-primary);
}
.event-card-link p {
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--color-text);
}
.events-page-grid .animate-on-scroll:nth-child(2) { transition-delay: 0.05s; }
.events-page-grid .animate-on-scroll:nth-child(3) { transition-delay: 0.1s; }
.events-page-grid .animate-on-scroll:nth-child(4) { transition-delay: 0.15s; }
.events-page-grid .animate-on-scroll:nth-child(5) { transition-delay: 0.2s; }
.events-page-grid .animate-on-scroll:nth-child(6) { transition-delay: 0.25s; }
.events-page-grid .animate-on-scroll:nth-child(7) { transition-delay: 0.3s; }
.events-page-grid .animate-on-scroll:nth-child(8) { transition-delay: 0.35s; }
.events-page-grid .animate-on-scroll:nth-child(9) { transition-delay: 0.4s; }
.events-page-grid .animate-on-scroll:nth-child(10) { transition-delay: 0.45s; }

/* ---------------------------------
   13. SLIDER SECTIONS (Blogs & Media)
   ---------------------------------
*/
.slider-container {
    position: relative;
    margin: 0 -2rem; 
    padding: 0 2rem;
}
.slider-wrapper {
    display: flex;
    gap: 1.5rem;
    padding-block: 1rem;
    overflow-x: auto;
    scroll-behavior: smooth;
    scrollbar-width: none;
    -ms-overflow-style: none;
}
.slider-wrapper::-webkit-scrollbar {
    display: none;
}
.blog-card {
    flex: 0 0 350px;
    display: block;
    text-decoration: none;
    background: var(--color-surface);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    border: 1px solid var(--color-border);
}
.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0, 191, 255, 0.15);
}
.blog-card img {
    height: 200px;
    width: 100%;
    object-fit: cover;
}
.blog-card .card-content {
    padding: 1.5rem;
}
.blog-card h4 {
    color: var(--color-heading);
    margin-bottom: 0.5rem;
}
.blog-card p {
    font-size: 0.9rem;
    margin-bottom: 1rem;
    color: var(--color-text);
}
.read-more {
    color: var(--color-primary);
    font-weight: 500;
    transition: letter-spacing 0.3s ease;
}
.blog-card:hover .read-more {
    letter-spacing: 0.5px;
}
.media-card {
    flex: 0 0 400px;
    height: 250px;
    display: block;
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    background: var(--color-surface);
}
.media-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease, filter 0.5s ease;
}
.media-card:hover img {
    transform: scale(1.05);
    filter: brightness(0.8);
}
.media-card-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    justify-content: center;
    align-items: flex-end;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    padding: 1.5rem;
}
.media-card-overlay h3 {
    color: #fff;
    font-size: 1.5rem;
    transform: translateY(8px);
    transition: transform 0.4s ease, color 0.4s ease;
}
.media-card:hover .media-card-overlay h3 {
    transform: translateY(0);
    color: var(--color-primary);
}
.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
}
.slider-btn:hover {
    background: rgba(0, 191, 255, 0.3);
}
.prev-btn { left: 0.5rem; }
.next-btn { right: 0.5rem; }

/* ---------------------------------
   14. MEDIA PAGE
   ---------------------------------
*/
#media-gallery-hero {
    padding-top: 10rem;
    text-align: center;
}
.media-gallery-section {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
    border-bottom: 1px solid var(--color-border);
}
.media-gallery-section:last-of-type {
    border-bottom: none;
}
.media-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1rem;
}
.media-grid img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.media-grid img:hover {
    transform: scale(1.03);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

/* ---------------------------------
   15. BLOGS PAGE
   ---------------------------------
*/
#blogs-archive {
    padding-top: 10rem;
    min-height: 100vh;
}
.blogs-page-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
}
.blogs-page-grid .blog-card {
    display: block;
    text-decoration: none;
    background: var(--color-surface);
    border-radius: 8px;
    overflow: hidden;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    border: 1px solid var(--color-border);
    height: 100%;
}
.blogs-page-grid .blog-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0, 191, 255, 0.15);
}
.blogs-page-grid .blog-card img {
    height: 200px;
    width: 100%;
    object-fit: cover;
}
.blogs-page-grid .blog-card .card-content {
    padding: 1.5rem;
}
.blogs-page-grid .blog-card h4 {
    color: var(--color-heading);
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}
.blogs-page-grid .blog-card p {
    font-size: 0.9rem;
    margin-bottom: 1rem;
    color: var(--color-text);
}
.blogs-page-grid .blog-card .read-more {
    color: var(--color-primary);
    font-weight: 500;
    transition: letter-spacing 0.3s ease;
}
.blogs-page-grid .blog-card:hover .read-more {
    letter-spacing: 0.5px;
}
.blogs-page-grid .blog-card:hover h4 {
    color: var(--color-primary);
}
.blogs-page-grid .animate-on-scroll:nth-child(2) { transition-delay: 0.05s; }
.blogs-page-grid .animate-on-scroll:nth-child(3) { transition-delay: 0.1s; }
.blogs-page-grid .animate-on-scroll:nth-child(4) { transition-delay: 0.15s; }
.blogs-page-grid .animate-on-scroll:nth-child(5) { transition-delay: 0.2s; }
.blogs-page-grid .animate-on-scroll:nth-child(6) { transition-delay: 0.25s; }
.blogs-page-grid .animate-on-scroll:nth-child(7) { transition-delay: 0.3s; }
.blogs-page-grid .animate-on-scroll:nth-child(8) { transition-delay: 0.35s; }

/* ---------------------------------
   NAV BAR FIX FOR NEW ITEMS
   ---------------------------------
*/
.nav-links .cta-button-wrapper {
    margin-left: 2rem;
}
.nav-links .cta-button-wrapper a.cta-button {
    color: var(--color-background);
    padding: 0.5rem 1rem;
}
.nav-links .cta-button-wrapper a.cta-button:hover {
    color: var(--color-primary);
}
.nav-links .cta-button-wrapper a.cta-button::after {
    display: none;
}

/* ---------------------------------
   11. RESPONSIVE MEDIA QUERIES
   ---------------------------------
*/
@media (max-width: 1200px) {
    .events-page-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    .blogs-page-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}
@media (max-width: 992px) {
    .events-page-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .blogs-page-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    #hero h1 { font-size: 3rem; }
    
    .nav-links { display: none; } /* Basic mobile menu logic can be added here */
    .footer-content {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
    .footer-right { margin-top: 1rem; }
    .footer-right a:first-child { margin-left: 0; }
    .form-row {
        flex-direction: column;
        gap: 0;
        margin-bottom: 0;
    }
    .events-page-grid { grid-template-columns: 1fr; }
    .blogs-page-grid { grid-template-columns: 1fr; }
    .page-title { font-size: 2.5rem; }
}