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

body {
    font-family: 'Inter', sans-serif;
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
}

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

/* Preloader */
#preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #fff;
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: opacity 0.6s ease-out, visibility 0.6s ease-out;
}

#preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.preloader-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    animation: pulse 2s infinite ease-in-out;
}

.preloader-content img {
    width: 100px;
    margin-bottom: 20px;
}

.loading-bar {
    width: 0;
    height: 2px;
    background: #000;
    animation: loadProgress 1.5s ease-in-out forwards;
}

@keyframes loadProgress {
    0% {
        width: 0;
    }

    100% {
        width: 100px;
    }
}

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.8;
        transform: scale(0.98);
    }
}



/* --- 3D Background Cube --- */
.cube-container {
    position: fixed;
    top: 50%;
    left: 50%;
    width: 200px;
    height: 200px;
    transform: translate(-50%, -50%);
    perspective: 1000px;
    z-index: -1;
    /* Behind content */
    pointer-events: none;
    /* Let clicks pass through */
    opacity: 0.15;
    /* Subtle */
}

.cube {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transform: rotateX(0deg) rotateY(0deg);
    /* Transition info managed by JS for immediate response, or slight easing here */
    will-change: transform;
}

.face {
    position: absolute;
    width: 200px;
    height: 200px;
    border: 1px solid #ff0000;
    background: rgba(255, 0, 0, 0.7);
}

.face.front {
    transform: translateZ(100px);
}

.face.back {
    transform: rotateY(180deg) translateZ(100px);
}

.face.right {
    transform: rotateY(90deg) translateZ(100px);
}

.face.left {
    transform: rotateY(-90deg) translateZ(100px);
}

.face.top {
    transform: rotateX(90deg) translateZ(100px);
}

.face.bottom {
    transform: rotateX(-90deg) translateZ(100px);
}

/* --- Scroll Up Button --- */
.scroll-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: #111;
    color: #fff;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    z-index: 100;
    font-size: 1.2rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.scroll-top-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-top-btn:hover {
    background: #333;



    transform: translateY(-3px);
}

/* Hamburger Menu Toggle (Hidden on Desktop) */
.menu-toggle {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    z-index: 1001;
    /* Above mobile menu overlay */
    flex-direction: column;
    gap: 6px;
}

.menu-toggle .bar {
    width: 30px;
    height: 2px;
    background-color: #fff;
    /* Start white for hero */
    transition: all 0.3s ease;
}

.header.scrolled .menu-toggle .bar {
    background-color: #333;
    /* Black on scrolled white header */
}

/* Header & Logo */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 5%;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.4s ease;
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.95);
    padding: 1rem 5%;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.logo img {
    height: 60px;
    /* Adjust based on preference */
    object-fit: contain;
    transition: filter 0.4s ease;
    /* Black logo inverted to white for dark hero */
    filter: invert(1) brightness(2);
}

.header.scrolled .logo img {
    /* Reset inverse for white background (black logo) */
    filter: none;
}

/* Navigation */
.nav ul {
    list-style: none;
    display: flex;
    gap: 3rem;
}

.nav a {
    text-decoration: none;
    color: #fff;
    /* White for hero contrast */
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
    font-weight: 400;
    transition: color 0.3s ease;
}

.nav a:hover {
    color: #ccc;
}

/* Scrolled Navigation Colors */
.header.scrolled .nav a {
    color: #333;
}

.header.scrolled .nav a:hover {
    color: #000;
}

/* Hero Section */
.hero {
    height: 100vh;
    background: url('https://images.unsplash.com/photo-1600607686527-6fb886090705?q=80&w=2000&auto=format&fit=crop') no-repeat center center/cover;
    background-attachment: fixed;
    /* Parallax Effect */
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    color: #fff;
    text-align: center;
}



/* --- Scroll Reveal Animations (Cuub Style Refined) --- */

/* Text Reveal (Slide Up) */
.reveal-text {
    opacity: 0;
    transform: translateY(40px);
    /* Slightly deeper offset */
    transition: all 1.2s cubic-bezier(0.23, 1, 0.32, 1);
    /* "Heavy" premium easing */
    will-change: transform, opacity;
}

.reveal-text.active {
    opacity: 1;
    transform: translateY(0);
}

/* Image Reveal (Scale Down/Zoom Out effect) */
.reveal-img-wrapper {
    overflow: hidden;
}

.reveal-img {
    opacity: 0;
    transform: scale(1.15);
    /* Slightly more zoom for drama */
    transition: all 1.4s cubic-bezier(0.23, 1, 0.32, 1);
    transition-delay: 0.1s;
    /* Base delay for images */
    will-change: transform, opacity;
}

.reveal-img.active {
    opacity: 1;
    transform: scale(1);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    animation: fadeIn 1.5s ease-out;
}

.hero h2 {
    font-family: 'Playfair Display', serif;
    font-size: 4rem;
    line-height: 1.2;
    margin-bottom: 1rem;
    font-weight: 400;
}

.hero .highlight {
    font-style: italic;
}

.hero .subtitle {
    font-size: 1.1rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-weight: 300;
}

/* Sections Common */
.section {
    padding: 6rem 5%;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-family: 'Playfair Display', serif;
    font-size: 2.5rem;
    font-weight: 400;
    margin-bottom: 3rem;
    text-align: center;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text .lead {
    font-size: 1.5rem;
    font-weight: 300;
    margin-bottom: 2rem;
    line-height: 1.4;
}

.pdf-content-placeholder {
    background: #f9f9f9;
    padding: 2rem;
    border-left: 1px solid #ddd;
    font-size: 0.95rem;
    color: #666;
}

/* Styled Image Container for About */
.about-image {
    position: relative;
    overflow: hidden;
    height: 500px;
    border-radius: 4px;
}

.about-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.about-image:hover img {
    transform: scale(1.03);
}

/* Portfolio Section */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    display: block;
    /* For anchor tag */
    text-decoration: none;
    /* Remove underline */
    color: inherit;
    /* Keep text color */
    cursor: pointer;
}

.project-img {
    height: 400px;
    background: #e0e0e0;
    margin-bottom: 1.5rem;
    overflow: hidden;
    position: relative;
    border-radius: 4px;
}

/* ... existing project-img styles ... */

.portfolio-footer {
    text-align: center;
    margin-top: 4rem;
}

.btn-see-more {
    display: inline-block;
    padding: 1rem 3rem;
    border: 1px solid #333;
    text-decoration: none;
    color: #333;
    font-family: 'Inter', sans-serif;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.btn-see-more:hover {
    background: #333;
    color: #fff;
    transform: translateY(-2px);
}

.project-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

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

.project-info h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-family: 'Inter', sans-serif;
}

.project-info p {
    font-size: 0.9rem;
    color: #777;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-see-more:hover {
    background: #333;
    color: #fff;
    transform: translateY(-2px);
}

/* Sponsors Section */
.sponsors {
    background: #fafafa;
    padding: 6rem 0;
}

.sponsors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 3rem;
    align-items: center;
    justify-items: center;
    margin-top: 4rem;
}

.sponsor-item img {
    max-width: 140px;
    height: auto;
    filter: grayscale(100%);
    opacity: 0.6;
    transition: all 0.3s ease;
}

.sponsor-item:hover img {
    filter: none;
    opacity: 1;
    transform: scale(1.05);
}

/* Footer */
.footer {
    background: #111;
    color: #fff;
    padding: 4rem 5%;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 3rem;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 600;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    text-align: right;
}

.footer-links a {
    color: #aaa;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #fff;
}

.copyright {
    border-top: 1px solid #333;
    padding-top: 2rem;
    text-align: center;
    font-size: 0.8rem;
    color: #666;
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        padding: 1.5rem;
    }

    .hero h2 {
        font-size: 2.5rem;
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

    /* --- Mobile Menu --- */
    .menu-toggle {
        display: flex;
        /* Visible on mobile */
    }

    .nav {
        position: fixed;
        top: 0;
        right: 0;
        width: 100%;
        height: 100vh;
        background: rgba(0, 0, 0, 0.95);
        display: flex;
        justify-content: center;
        align-items: center;
        z-index: 1000;
        opacity: 0;
        visibility: hidden;
        transition: all 0.4s ease;
        /* Slide text effect */
    }

    .nav.nav-open {
        opacity: 1;
        visibility: visible;
    }

    .nav ul {
        display: flex;
        flex-direction: column;
        text-align: center;
        gap: 3rem;
    }

    .nav a {
        font-size: 1.5rem;
        color: #fff !important;
        /* Always white on dark overlay */
        font-weight: 300;
        letter-spacing: 2px;
    }
}