:root {
    --bg-color: #050505;
    --card-bg: #111;
    --primary-green: #00FF88;
    --primary-red: #FF0000;
    --text-white: #FFFFFF;
}

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

body {
    background-color: var(--bg-color);
    font-family: 'Montserrat', sans-serif;
    display: flex;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 500px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.card {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
    background-color: var(--card-bg);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.5);
}

.card img {
    width: 100%;
    display: block;
    transition: opacity 0.3s ease;
}

.card:hover img {
    opacity: 0.9;
}

.btn {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 15px;
    text-align: center;
    text-decoration: none;
    font-weight: 900;
    font-size: 1.2rem;
    text-transform: uppercase;
    color: #000;
    transition: all 0.3s ease;
    border: none;
}

.btn-green {
    background-color: var(--primary-green);
}

.btn-green:hover {
    background-color: #00cc6a;
    letter-spacing: 1px;
}

.btn-red {
    background-color: var(--primary-red);
    color: #fff;
}

.btn-red:hover {
    background-color: #cc0000;
    letter-spacing: 1px;
}

.btn-whatsapp {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-whatsapp i {
    font-size: 1.4rem;
}

/* Responsive tweaks */
@media (max-width: 400px) {
    .btn {
        font-size: 1rem;
        padding: 12px;
    }
}