:root {
    --bg-color: #0a0a0a; /* Dark background matching landing page */
    --card-bg: rgba(18, 18, 18, 0.6);
    --text-main: #ffffff;
    --text-light: #999999;
    --accent: #ff004f;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    /* overflow: hidden; */ 
    /* height: 100vh; */
}

/* Background grid pattern */
.bg-grid-pattern { display: none; } body { background-color: #000; }

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.5rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
}

.back-link {
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    font-size: 1rem;
    transition: opacity 0.3s ease;
}

.back-link:hover {
    opacity: 0.8;
}

.logo {
    color: #fff;
    font-size: 1.5rem;
    font-weight: 700;
}

/* 3D Scene */
.scene {
    width: 100%;
    min-height: 600px;
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 2000px;
    z-index: 1;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(3, 270px);
    gap: 40px;
    transform-style: preserve-3d;
    transform: scale(0.8) rotateX(55deg) rotateZ(-45deg);
    transition: opacity 0.4s ease;
}

.grid-container.dimmed {
    opacity: 0.1;
    pointer-events: none;
}

/* 3D Cards */
.card-wrapper {
    width: 270px;
    height: 380px;
    perspective: 1000px;
    transform-style: preserve-3d;
}

.card {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    box-shadow: -15px 15px 25px rgba(0, 0, 0, 0.4);
    cursor: pointer;
    user-select: none;
    -webkit-user-select: none;
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.4s ease;
}

/* Hover is handled entirely by GSAP in projects.js for smooth spring physics */
/* .card:hover {
    transform: translateZ(80px);
    box-shadow: -40px 40px 50px rgba(0, 0, 0, 0.6);
} */

.card-inner {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.8s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.card-front, .card-back {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    backface-visibility: hidden;
    border-radius: 8px;
    overflow: hidden;
}

.card-front {
    background: var(--card-bg);
}

.card-back {
    background: #121212;
    border: 1px solid rgba(255,255,255,0.08);
    transform: rotateY(180deg);
    padding: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    box-shadow: inset 0 0 50px rgba(0,0,0,0.5);
    position: relative;
    overflow: hidden;
}

.card-back-img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    filter: blur(8px);
    opacity: 0.3;
    z-index: 1;
}

.card-back-content {
    position: relative;
    z-index: 2;
    padding: 2rem;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

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

.card-back p {
    color: var(--text-light);
    font-size: 1rem;
    line-height: 1.5;
}

.card-content {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
}

/* Project Images */
.img-1 { background-image: url('images/CSE VR PROJECT CARD IMAGE.jpg'); } 
.img-2 { background-image: url('images/MODERN LIFE FUED PROJECT CARD IMAGE.jpg'); }
.img-3 { background-image: url('images/SCHEDULIX TIMETABLER PROJECT CARD IMAGE.jpg'); }
.img-4 { background-image: url('images/VERICHAIN PROJECT CARD IMAGE.jpg'); }
.img-5 { background-image: url('images/SKYE PROJECT CARD IMAGE.png'); }
.img-6 { background-image: url('images/JETT PROJECT CARD.jpg'); }

/* Add mock title text onto the front of cards */
.card-front::after {
    /* We can use CSS counter or JS to set text, but for now we'll just let the bg gradient speak, or use a pseudo element inherited from .card */
}

/* Active State Container (Fullscreen) */
.active-card-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 10000px;
}

.active-card-container .card {
    /* Override hover for active card */
    cursor: default;
    box-shadow: 0 30px 60px rgba(0,0,0,0.5);
    pointer-events: auto;
    /* Scale it up */
    width: 400px;
    height: 560px;
}

.active-card-container .card:hover {
    transform: none; /* Let GSAP handle floating */
    box-shadow: 0 30px 60px rgba(0,0,0,0.5);
}

.active-card-container .card.is-flipped .card-inner {
    transform: rotateY(180deg);
}

/* Modal Overlay (Just for background dim/close) */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    z-index: 1500;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.close-btn {
    position: absolute;
    top: 30px;
    right: 40px;
    background: none;
    border: none;
    font-size: 3rem;
    cursor: pointer;
    color: #fff;
    transition: transform 0.3s ease;
}

.close-btn:hover {
    transform: scale(1.2);
}



/* Card Buttons on Front */
.card-front {
    position: relative;
}
.card-buttons {
    position: absolute;
    bottom: 20px;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: center;
    gap: 15px;
    z-index: 10;
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
    transform: translateY(10px);
}
.card:hover .card-buttons {
    opacity: 1;
    transform: translateY(0);
}

.about-btn {
    background: #1a73e8;
    color: white;
    border: none;
    border-radius: 20px;
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(26, 115, 232, 0.4);
    transition: background 0.2s;
    pointer-events: auto;
}
.about-btn:hover {
    background: #1557b0;
}

.github-btn-front {
    background: transparent;
    color: #1a73e8;
    border: 2px solid #1a73e8;
    border-radius: 20px;
    padding: 8px 18px;
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s;
    pointer-events: auto;
    background: rgba(255,255,255,0.9);
}
.github-btn-front:hover {
    background: #e8f0fe;
}

.close-about-btn {
    background: transparent;
    color: #fff;
    border: 1px solid rgba(255,255,255,0.5);
    border-radius: 20px;
    padding: 8px 20px;
    cursor: pointer;
    margin-top: 15px;
    transition: all 0.2s;
}
.close-about-btn:hover {
    background: rgba(255,255,255,0.1);
}


/* Enhanced Active Card Styling for About Section */
.active-card-container .card {
    width: 600px;
    height: 400px;
}
.active-card-container .card-back {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: rgba(10, 10, 15, 0.98);
    padding: 40px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    overflow: hidden;
}
.active-card-container .card-back h3 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 2px;
}
.active-card-container .card-back p {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 30px;
    color: #bbb;
    max-width: 80%;
}
.github-btn {
    display: inline-block;
    padding: 12px 30px;
    background: linear-gradient(45deg, #ff3333, #ff6b6b);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: 0 4px 15px rgba(255, 51, 51, 0.4);
    transition: all 0.3s ease;
    pointer-events: auto;
    position: relative;
    z-index: 100;
}
.github-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(255, 51, 51, 0.6);
    color: white;
}

@media (max-width: 768px) {
    .projects-section {
        padding: 3rem 0.75rem 4.5rem;
    }

    .projects-header {
        margin: 0 auto 1rem;
    }

    .scene {
        min-height: 500px;
        height: 500px;
        padding: 0;
        overflow: hidden;
    }

    .grid-container {
        width: max-content;
        grid-template-columns: repeat(3, 150px);
        gap: 14px;
        transform: scale(0.55) rotateX(55deg) rotateZ(-45deg);
        transform-origin: center center;
        margin: 0 auto;
    }

    .card-wrapper {
        width: 150px;
        height: 210px;
    }

    .card {
        height: 100%;
    }

    .card-back-content {
        padding: 1.25rem;
    }
}