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

body, html {
    font-family: 'Orbitron', sans-serif;
    height: 100%;
    overflow-x: hidden;
}
.xiudeptrai {
    font-family: 'arial', sans-serif;
    height: 100%;
    overflow-x: hidden;
}

header {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 10;
}

.logo {
    color: #fff;
    font-size: 28px;
    font-weight: bold;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 25px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s ease;
}

nav ul li a:hover {
    color: #00ffff;
}

.hero {
    background: url('../images/background3.jpg') no-repeat center center/cover;
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    text-align: center;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 30, 0.6);
}

.content {
    position: relative;
    z-index: 2;
    max-width: 800px;
}

.content h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

.content h1 span {
    color: cyan;
    font-size: 56px;
    text-shadow: 0 0 20px #0ff;
}

.content p {
    font-size: 20px;
    margin-bottom: 30px;
}

.buttons .btn {
    padding: 12px 24px;
    background: transparent;
    border: 2px solid white;
    color: white;
    margin: 0 10px;
    text-decoration: none;
    font-size: 16px;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.buttons .btn:hover {
    background: white;
    color: #000;
}

.btn-primary {
    background-color: cyan;
    border: none;
    color: #000;
}

.btn-primary:hover {
    background-color: #00e5e5;
}


footer {
    background: #111;
    color: #ccc;
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
    font-size: 14px;
    border-top: 1px solid #444;
}

footer .socials a {
    color: #0ff;
    text-decoration: none;
    margin: 0 5px;
    transition: 0.3s;
}

footer .socials a:hover {
    color: #fff;
    text-shadow: 0 0 5px #0ff;
}
.services {
    background: #1a1a2e;
    padding: 60px 20px;
    text-align: center;
    color: #fff;
}

.services h2 {
    font-size: 32px;
    margin-bottom: 40px;
    color: cyan;
    text-shadow: 0 0 5px #0ff;
}

.service-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    max-width: 1200px;
    margin: 0 auto;
}

.service-box {
    background: #2f2f48;
    padding: 30px 20px;
    border-radius: 12px;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid #444;
}

.service-box img {
    width: 80px;
    margin-bottom: 15px;
}

.service-box h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: #0ff;
}

.service-box p {
    font-size: 14px;
    color: #ccc;
}

.service-box:hover {
    transform: translateY(-8px);
    box-shadow: 0 0 15px #0ff3;
}
header nav ul li a {
    color: #fff;
    text-decoration: none;
    font-size: 15px;
    transition: 0.3s;
}

header nav ul li a:hover {
    color: #0ff;
    text-shadow: 0 0 5px #0ff;
}

header nav ul li {
    display: inline-block;
}