/* CSS Reset and Variables */
:root {
    --primary-bg: #f7f5f0; /* Creamy beige */
    --secondary-bg: #eceae4; /* Slightly darker beige for sections */
    --text-main: #2c2c2c; /* Soft black/charcoal */
    --text-light: #555555;
    --accent: #d4a373; /* Subtle earthy accent */
    --border-color: #dcd7ce;
    
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Inter', sans-serif;
    
    --transition: all 0.3s ease;
    --transition-slow: all 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
}

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

button, input, select, textarea {
    font-family: inherit;
}

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 400;
}

h1 {
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
    letter-spacing: -0.5px;
}

h2 {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    text-align: center;
    position: relative;
}

h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 1px;
    background-color: var(--text-main);
    margin: 1rem auto 0;
}

/* Navigation Bar */
#navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: rgba(247, 245, 240, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo a {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-heading);
    font-size: 1.5rem;
    text-decoration: none;
    color: var(--text-main);
    letter-spacing: 1px;
}

.nav-logo {
    height: 45px;
    width: auto;
    object-fit: contain;
}

.logo span {
    font-weight: 600;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-main);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0%;
    height: 1px;
    background-color: var(--text-main);
    transition: var(--transition);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0 2rem;
    padding-top: 80px; /* Offset for navbar */
}

.hero-content {
    max-width: 800px;
    animation: fadeIn 1.5s ease-out;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    font-family: var(--font-heading);
    font-style: italic;
}

.divider {
    width: 100px;
    height: 1px;
    background-color: var(--border-color);
    margin: 0 auto 2rem;
}

.founded-text {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 3rem;
}

.btn-primary {
    display: inline-block;
    padding: 1rem 2.5rem;
    border: 1px solid var(--text-main);
    background: transparent;
    color: var(--text-main);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.85rem;
    transition: var(--transition);
}

.btn-primary:hover {
    background-color: var(--text-main);
    color: var(--primary-bg);
}

/* Sections General */
.section-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 6rem 2rem;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

/* About Us Section */
.about {
    background-color: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.about-desc {
    text-align: center;
    font-family: var(--font-heading);
    font-style: italic;
    font-weight: 400;
    font-size: 1.15rem;
    line-height: 1.9;
    letter-spacing: 0.2px;
    max-width: 720px;
    margin: 0 auto 4rem;
    color: var(--text-light);
}

.team-heading {
    text-align: center;
    margin-bottom: 3rem;
    font-size: 1.8rem;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 2rem;
    text-align: center;
}

.other-leadership-container {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    text-align: center;
    margin-top: 2rem;
}

.team-member {
    padding: 2rem 1rem;
    border: 1px solid var(--border-color);
    background-color: var(--primary-bg);
    transition: var(--transition);
}

.team-member.other-leadership {
    padding: 1.5rem 1rem;
    max-width: 220px;
    width: 100%;
}

.team-member.other-leadership h4 {
    font-size: 1.05rem;
}

.team-member:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.team-member h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.team-member p {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-light);
}

/* Competition Section */
.competition {
    background-color: var(--primary-bg);
    border-bottom: 1px solid var(--border-color);
}

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

.competition-desc {
    font-family: var(--font-heading);
    font-style: italic;
    font-weight: 400;
    font-size: 1.1rem;
    line-height: 1.9;
    letter-spacing: 0.2px;
    max-width: 700px;
    margin: 0 auto 3rem;
    color: var(--text-light);
}

/* Gallery / Carousel */
.gallery {
    background-color: var(--primary-bg);
}

.carousel-container {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 40px rgba(0,0,0,0.03);
}

.carousel-slide {
    display: none;
    width: 100%;
}

.carousel-slide.active {
    display: block;
    animation: fadeEffect 1s;
}

.carousel-slide img {
    width: 100%;
    height: auto;
    display: block;
    aspect-ratio: 16/9;
    object-fit: cover;
}

/* Carousel Buttons */
.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(247, 245, 240, 0.7);
    color: var(--text-main);
    border: 1px solid var(--border-color);
    cursor: pointer;
    padding: 1rem;
    font-size: 1.2rem;
    transition: var(--transition);
    z-index: 10;
}

.carousel-btn:hover {
    background-color: var(--text-main);
    color: var(--primary-bg);
}

.prev-btn {
    left: 0;
}

.next-btn {
    right: 0;
}

/* Carousel Dots */
.carousel-dots {
    text-align: center;
    padding: 1rem 0;
    background-color: var(--primary-bg);
    border-top: 1px solid var(--border-color);
}

.dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    margin: 0 5px;
    background-color: var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

.dot.active, .dot:hover {
    background-color: var(--text-main);
}

/* Footer */
footer {
    background-color: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    padding: 3rem 2rem;
    text-align: center;
}

footer p {
    font-size: 0.85rem;
    color: var(--text-light);
    letter-spacing: 1px;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeEffect {
    from { opacity: 0.4; }
    to { opacity: 1; }
}

.section-container.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Slideshows Section */
.slideshows {
    background-color: var(--secondary-bg);
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.slideshows-desc {
    text-align: center;
    font-family: var(--font-heading);
    font-style: italic;
    font-weight: 400;
    font-size: 1.1rem;
    line-height: 1.9;
    letter-spacing: 0.2px;
    max-width: 700px;
    margin: 0 auto 3rem;
    color: var(--text-light);
}

.slides-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2.5rem;
    padding: 1rem 0;
}

.slide-card {
    display: flex;
    flex-direction: column;
    background-color: var(--primary-bg);
    border: 1px solid var(--border-color);
    text-decoration: none;
    color: inherit;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s ease, box-shadow 0.3s ease;
}

.section-container.revealed .slide-card {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger delay only for opacity and transform during load */
.section-container.revealed .slide-card:nth-child(1) { transition-delay: 0.05s, 0.05s, 0s, 0s; }
.section-container.revealed .slide-card:nth-child(2) { transition-delay: 0.1s, 0.1s, 0s, 0s; }
.section-container.revealed .slide-card:nth-child(3) { transition-delay: 0.15s, 0.15s, 0s, 0s; }
.section-container.revealed .slide-card:nth-child(4) { transition-delay: 0.2s, 0.2s, 0s, 0s; }
.section-container.revealed .slide-card:nth-child(5) { transition-delay: 0.25s, 0.25s, 0s, 0s; }
.section-container.revealed .slide-card:nth-child(6) { transition-delay: 0.3s, 0.3s, 0s, 0s; }
.section-container.revealed .slide-card:nth-child(7) { transition-delay: 0.35s, 0.35s, 0s, 0s; }
.section-container.revealed .slide-card:nth-child(8) { transition-delay: 0.4s, 0.4s, 0s, 0s; }
.section-container.revealed .slide-card:nth-child(9) { transition-delay: 0.45s, 0.45s, 0s, 0s; }
.section-container.revealed .slide-card:nth-child(10) { transition-delay: 0.5s, 0.5s, 0s, 0s; }
.section-container.revealed .slide-card:nth-child(11) { transition-delay: 0.55s, 0.55s, 0s, 0s; }
.section-container.revealed .slide-card:nth-child(12) { transition-delay: 0.6s, 0.6s, 0s, 0s; }
.section-container.revealed .slide-card:nth-child(13) { transition-delay: 0.65s, 0.65s, 0s, 0s; }
.section-container.revealed .slide-card:nth-child(14) { transition-delay: 0.7s, 0.7s, 0s, 0s; }
.section-container.revealed .slide-card:nth-child(15) { transition-delay: 0.75s, 0.75s, 0s, 0s; }
.section-container.revealed .slide-card:nth-child(16) { transition-delay: 0.8s, 0.8s, 0s, 0s; }
.section-container.revealed .slide-card:nth-child(17) { transition-delay: 0.85s, 0.85s, 0s, 0s; }

.slide-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.06);
    border-color: var(--accent);
}

.slide-card-image {
    position: relative;
    width: 100%;
    aspect-ratio: 16/9;
    overflow: hidden;
    background-color: var(--secondary-bg);
    border-bottom: 1px solid var(--border-color);
}

.slide-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.slide-card:hover .slide-card-image img {
    transform: scale(1.05);
}

.slide-card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(44, 44, 44, 0.4);
    opacity: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: var(--transition);
}

.slide-card:hover .slide-card-overlay {
    opacity: 1;
}

.btn-view-slide {
    display: inline-block;
    padding: 0.6rem 1.5rem;
    border: 1px solid var(--primary-bg);
    background-color: rgba(247, 245, 240, 0.95);
    color: var(--text-main);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.75rem;
    font-weight: 500;
    transition: var(--transition);
}

.btn-view-slide:hover {
    background-color: var(--text-main);
    color: var(--primary-bg);
    border-color: var(--text-main);
}

.slide-card-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    gap: 0.5rem;
}

.slide-card-content h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    color: var(--text-main);
    margin-top: 0.25rem;
    line-height: 1.3;
}

.slide-sub {
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: auto;
}

.slide-tag {
    display: inline-block;
    align-self: flex-start;
    padding: 0.2rem 0.6rem;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-weight: 500;
    border-radius: 2px;
}

.category-intro {
    background-color: #e2e0da;
    color: #555555;
}

.category-foundations {
    background-color: #e5dcd3;
    color: #7c6249;
}

.category-ml {
    background-color: #dfede2;
    color: #3f684c;
}

.category-dl {
    background-color: #deebf2;
    color: #2b5672;
}

.category-rl {
    background-color: #fce8db;
    color: #925331;
}

/* Responsive */
@media (max-width: 768px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    
    .nav-container {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    .hero {
        padding-top: 120px;
    }
}