@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700&family=Roboto:wght@300;400&display=swap');

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

body {
    background: #0a0a0a; /* Nền tối sâu */
    color: #fff;
    font-family: 'Roboto', sans-serif;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

/* Hiệu ứng lưới điện tử chìm phía sau */
body::before {
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 2px 2px, #1a1a1a 1px, transparent 0);
    background-size: 40px 40px;
    z-index: -1;
}

.container {
    text-align: center;
    z-index: 2;
    padding: 20px;
}

.logo {
    font-size: 50px;
    color: #00f2ff;
    margin-bottom: 20px;
    text-shadow: 0 0 20px #00f2ff;
    animation: pulse 2s infinite;
}

h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 3rem;
    letter-spacing: 5px;
    margin-bottom: 10px;
}

.flicker {
    color: #ff0055;
    text-shadow: 0 0 10px #ff0055;
    animation: blink 0.5s infinite alternate;
}

.highlight {
    color: #00f2ff;
    font-weight: bold;
    text-shadow: 0 0 5px #00f2ff;
}

.description {
    font-size: 1.1rem;
    line-height: 1.6;
    opacity: 0.8;
    margin-bottom: 40px;
}

/* Countdown Clock */
.countdown {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
}

.box {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(0, 242, 255, 0.3);
    padding: 20px;
    min-width: 100px;
    border-radius: 8px;
    backdrop-filter: blur(5px);
}

.box span {
    display: block;
    font-family: 'Orbitron', sans-serif;
    font-size: 2.5rem;
    color: #00f2ff;
}

/* Animations */
@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
    80% { opacity: 0.9; }
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.7; }
    100% { transform: scale(1); opacity: 1; }
}

.socials a {
    color: #fff;
    font-size: 1.5rem;
    margin: 0 15px;
    transition: 0.3s;
}

.socials a:hover {
    color: #00f2ff;
    text-shadow: 0 0 10px #00f2ff;
}

@media (max-width: 600px) {
    h1 { font-size: 1.8rem; }
    .countdown { gap: 10px; }
    .box { min-width: 70px; padding: 10px; }
    .box span { font-size: 1.5rem; }
}