/* --- CẤU HÌNH CHUNG --- */
body {
    background-color: #0a0a0a;
    color: #f0f0f0;
    font-family: 'Segoe UI', sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* --- HEADER --- */
header {
    background: linear-gradient(180deg, #000 0%, #1a1a1a 100%);
    padding: 40px 0;
    text-align: center;
    border-bottom: 2px solid #d6e419;
    box-shadow: 0 0 20px rgba(255, 0, 0, 0.4);
}

header h1 {
    font-size: 3em;
    text-transform: uppercase;
    letter-spacing: 5px;
    margin: 0;
    color: white;
}

header .highlight {
    color: #f6fa16;
    text-shadow: 0 0 10px #fffb00e3;
}

header p {
    color: #888;
    margin-top: 10px;
    font-style: italic;
}

/* --- MENU --- */
nav {
    background: #111;
    text-align: center;
    padding: 15px;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid #333;
}

nav a {
    color: #bbb;
    text-decoration: none;
    margin: 0 20px;
    font-weight: bold;
    text-transform: uppercase;
    transition: 0.3s;
}

nav a:hover {
    color: #fffb00;
    text-shadow: 0 0 8px #ffee00;
}

/* --- CONTAINER --- */
.container {
    max-width: 1200px;
    margin: 40px auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    padding: 0 20px;
    width: 100%;
    box-sizing: border-box;
}

/* --- CARD XE --- */
.car-card {
    background: #161616;
    border: 1px solid #333;
    border-radius: 12px;
    overflow: hidden;
    transition: all 0.4s ease;
}

.car-card:hover {
    transform: translateY(-10px);
    border-color: #eeff00;
    box-shadow: 0 10px 30px rgba(255, 0, 0, 0.2);
}

.car-card img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    filter: brightness(0.85);
    transition: 0.5s;
}

.car-card:hover img {
    filter: brightness(1.1);
    transform: scale(1.05);
}

/* --- INFO & BUTTON --- */
.info { padding: 20px; text-align: center; }
.info h2 { margin: 0 0 10px; font-size: 1.5em; color: #fff; }
.info p { color: #aaa; min-height: 40px; }
.price { color: #f8f404; font-size: 1.4em; font-weight: bold; margin: 15px 0; text-shadow: 0 0 5px rgba(255,51,51,0.5); }

.btn-buy {
    background: transparent;
    color: #ffee00;
    border: 2px solid #eeff00;
    padding: 10px 35px;
    font-weight: bold;
    text-transform: uppercase;
    cursor: pointer;
    transition: 0.3s;
}
.btn-buy:hover { background: #b3ff00; color: #000; box-shadow: 0 0 20px #fbff00; }

/* --- FOOTER 3 CỘT (Mới) --- */
.footer {
    background-color: #050505;
    color: #888;
    padding: 50px 20px;
    margin-top: auto; /* Đẩy footer xuống đáy */
    border-top: 1px solid #222;
    
    /* Thiết lập Grid cho footer */
    display: grid;
    grid-template-columns: 1fr; /* Mobile: 1 cột */
    gap: 30px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    width: 100%;
}

.footer-column h3 {
    color: white;
    border-left: 3px solid #fbff00; /* Viền vang bên cạnh tiêu đề */
    padding-left: 10px;
    margin-bottom: 20px;
    text-transform: uppercase;
    font-size: 1.1em;
}

.footer-column ul { list-style: none; padding: 0; }
.footer-column ul li { margin-bottom: 10px; }
.footer-column a { color: #888; text-decoration: none; transition: 0.3s; }
.footer-column a:hover { color: #fbff00; padding-left: 5px; } /* Hiệu ứng đẩy chữ khi hover */

.copyright {
    background-color: #000;
    text-align: center;
    padding: 20px;
    color: #444;
    border-top: 1px solid #111;
    font-size: 0.9em;
}

/* --- RESPONSIVE (MÁY TÍNH) --- */
@media (min-width: 768px) {
    /* Khi màn hình lớn hơn 768px (Tablet/PC) thì Footer chia 3 cột */
    .footer {
        grid-template-columns: repeat(3, 1fr);
        text-align: left;
    }
}