/* CSS RESET & VARIABLES */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --sw-color: #ffe81f; /* Star Wars Yellow */
    --sw-glow: rgba(255, 232, 31, 0.5);
    
    --st-color: #3388ff; /* Star Trek Blue */
    --st-glow: rgba(51, 136, 255, 0.5);
    
    --tbbt-color: #00ff73; /* Geeky Neon Green for TBBT */
    --tbbt-glow: rgba(0, 255, 115, 0.5);
    
    --expanse-color: #00e5ff; /* Protomolecule Cyan for The Expanse */
    --expanse-glow: rgba(0, 229, 255, 0.5);
    
    --bg-dark: #0a0a0f;
    --text-light: #ffffff;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-light);
    font-family: 'Roboto', sans-serif;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem 1rem;
}

/* STARS ANIMATION */
#stars, #stars2, #stars3 {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: -1;
    background: transparent;
}

#stars {
    width: 1px;
    height: 1px;
    background: transparent;
    box-shadow: 200px 300px #fff, 400px 500px #fff, 600px 100px #fff, 800px 900px #fff, 1000px 400px #fff, 1200px 700px #fff, 1400px 200px #fff, 1600px 800px #fff, 1800px 500px #fff, 300px 800px #fff, 500px 200px #fff, 900px 600px #fff, 1100px 100px #fff, 1300px 900px #fff, 1500px 400px #fff, 1700px 600px #fff;
    animation: animStar 50s linear infinite;
}

#stars::after {
    content: " ";
    position: absolute;
    top: 2000px;
    width: 1px;
    height: 1px;
    background: transparent;
    box-shadow: inherit;
}

@keyframes animStar {
    from { transform: translateY(0px); }
    to   { transform: translateY(-2000px); }
}

/* MAIN CONTAINER */
.container {
    width: 100%;
    max-width: 1400px;
    padding: 1rem;
    text-align: center;
    z-index: 10;
}

.title {
    font-family: 'Orbitron', sans-serif;
    font-size: 3rem;
    font-weight: 900;
    letter-spacing: 2px;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    background: linear-gradient(90deg, var(--sw-color), var(--st-color), var(--tbbt-color), var(--expanse-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: glow 3s ease-in-out infinite alternate;
}

.subtitle {
    font-size: 1.2rem;
    color: #aaaaaa;
    margin-bottom: 3.5rem;
}

@keyframes glow {
    from { text-shadow: 0 0 10px rgba(255,255,255,0.1); }
    to { text-shadow: 0 0 20px rgba(255,255,255,0.3); }
}

/* CARDS LAYOUT */
.cards-wrapper {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.card-link {
    text-decoration: none;
    color: inherit;
    perspective: 1000px;
}

.card {
    width: 290px;
    height: 490px;
    background: rgba(20, 20, 30, 0.7);
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    overflow: hidden;
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    transform-style: preserve-3d;
}

/* CARD IMAGE */
.card-image {
    width: 100%;
    height: 48%;
    background-size: cover;
    background-position: center;
    position: relative;
    overflow: hidden;
}

.card-image::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent, rgba(20, 20, 30, 0.9) 90%, rgba(20, 20, 30, 1));
}

.overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    opacity: 0.4;
    transition: opacity 0.4s ease;
}

.sw-overlay { background-color: rgba(232, 42, 42, 0.3); }
.st-overlay { background-color: rgba(51, 136, 255, 0.3); }
.tbbt-overlay { background-color: rgba(0, 255, 115, 0.3); }
.expanse-overlay { background-color: rgba(0, 229, 255, 0.3); }

/* CARD CONTENT */
.card-content {
    padding: 1.6rem;
    height: 52%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transform: translateZ(30px);
}

.card-content h2 {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.35rem;
    margin-bottom: 0.8rem;
    transition: color 0.3s ease;
}

.card-content p {
    font-size: 0.92rem;
    line-height: 1.5;
    color: #cccccc;
    margin-bottom: 1.2rem;
    flex-grow: 1;
}

/* BUTTONS */
.btn {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0.8rem 1.2rem;
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    font-size: 0.95rem;
    line-height: 1;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 5px;
    transition: all 0.3s ease;
    text-align: center;
    position: relative;
    overflow: hidden;
    z-index: 1;
    min-height: 44px;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0; left: -100%; width: 100%; height: 100%;
    background: rgba(255,255,255,0.2);
    transition: left 0.4s ease;
    z-index: -1;
}

.card:hover .btn::before {
    left: 0;
}

/* THEME SPECIFIC STYLES & HOVERS */

/* Star Wars */
.sw-btn {
    background-color: transparent;
    border: 2px solid var(--sw-color);
    color: var(--sw-color);
}
#sw-card:hover {
    border-color: var(--sw-color);
    box-shadow: 0 10px 30px var(--sw-glow), inset 0 0 15px var(--sw-glow);
}
#sw-card:hover h2 { color: var(--sw-color); text-shadow: 0 0 10px var(--sw-glow); }
#sw-card:hover .sw-overlay { opacity: 0; }
#sw-card:hover .sw-btn {
    background-color: var(--sw-color);
    color: #000;
    box-shadow: 0 0 15px var(--sw-glow);
}

/* Star Trek */
.st-btn {
    background-color: transparent;
    border: 2px solid var(--st-color);
    color: var(--st-color);
}
#st-card:hover {
    border-color: var(--st-color);
    box-shadow: 0 10px 30px var(--st-glow), inset 0 0 15px var(--st-glow);
}
#st-card:hover h2 { color: var(--st-color); text-shadow: 0 0 10px var(--st-glow); }
#st-card:hover .st-overlay { opacity: 0; }
#st-card:hover .st-btn {
    background-color: var(--st-color);
    color: #fff;
    box-shadow: 0 0 15px var(--st-glow);
}

/* The Big Bang Theory */
.tbbt-btn {
    background-color: transparent;
    border: 2px solid var(--tbbt-color);
    color: var(--tbbt-color);
}
#tbbt-card:hover {
    border-color: var(--tbbt-color);
    box-shadow: 0 10px 30px var(--tbbt-glow), inset 0 0 15px var(--tbbt-glow);
}
#tbbt-card:hover h2 { color: var(--tbbt-color); text-shadow: 0 0 10px var(--tbbt-glow); }
#tbbt-card:hover .tbbt-overlay { opacity: 0; }
#tbbt-card:hover .tbbt-btn {
    background-color: var(--tbbt-color);
    color: #000;
    box-shadow: 0 0 15px var(--tbbt-glow);
}

/* The Expanse */
.expanse-btn {
    background-color: transparent;
    border: 2px solid var(--expanse-color);
    color: var(--expanse-color);
}
#expanse-card:hover {
    border-color: var(--expanse-color);
    box-shadow: 0 10px 30px var(--expanse-glow), inset 0 0 15px var(--expanse-glow);
}
#expanse-card:hover h2 { color: var(--expanse-color); text-shadow: 0 0 10px var(--expanse-glow); }
#expanse-card:hover .expanse-overlay { opacity: 0; }
#expanse-card:hover .expanse-btn {
    background-color: var(--expanse-color);
    color: #000;
    box-shadow: 0 0 15px var(--expanse-glow);
}

/* RESPONSIVE */
@media (max-width: 1250px) {
    .cards-wrapper {
        gap: 1.5rem;
    }
    .card {
        width: 270px;
    }
}

@media (max-width: 600px) {
    .cards-wrapper {
        flex-direction: column;
        align-items: center;
    }
    .card {
        width: 100%;
        max-width: 340px;
    }
    .title {
        font-size: 2rem;
    }
}