:root {
    --primary-color: #00ff41; /* Vert Radioactif */
    --dark-bg: #0b0c0b;
    --card-bg: #151515;
    --border-color: #333;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--dark-bg);
    color: #ccc;
    background-image: radial-gradient(circle at 50% 10%, rgba(0, 255, 65, 0.05), transparent 60%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1, h2, h3, h4, .btn {
    font-family: 'Rajdhani', sans-serif;
    text-transform: uppercase;
}

/* --- NAVBAR --- */
.navbar {
    background-color: rgba(11, 12, 11, 0.95) !important;
    border-bottom: 1px solid var(--primary-color);
}

/* --- DOWNLOAD CARDS --- */
.os-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    height: 100%;
}

.os-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 255, 65, 0.15);
}

.os-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    color: #fff;
    transition: color 0.3s;
}

.os-card:hover .os-icon {
    color: var(--primary-color);
}

/* --- BUTTONS --- */
.btn-download {
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    font-weight: bold;
    padding: 10px 25px;
    border-radius: 5px;
    transition: 0.3s;
    width: 100%;
}

.btn-download:hover {
    background-color: var(--primary-color);
    color: #000;
    box-shadow: 0 0 15px var(--primary-color);
}

.btn-manual {
    color: #888;
    text-decoration: underline;
    font-size: 0.9rem;
}

.btn-manual:hover {
    color: #fff;
}

/* --- FOOTER --- */
footer {
    margin-top: auto;
    border-top: 1px solid #333;
    background-color: #000;
}

/* Utilitaires */
.text-neon { color: var(--primary-color); }