@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;600;800&display=swap');

:root {
    --primary-blue: #001f3f;
    --neon-blue: #00f0ff;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-main: #e0f7fa;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Outfit', sans-serif;
}

body {
    /* Nền đại dương chuyển động */
    background: linear-gradient(-45deg, #000428, #004e92, #001133, #020c1b);
    background-size: 400% 400%;
    animation: gradientBG 15s ease infinite;
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

@keyframes gradientBG {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

a {
    text-decoration: none;
    color: inherit;
}

/* Header Glassmorphism */
header {
    background: rgba(0, 8, 20, 0.6);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid var(--glass-border);
    padding: 1.5rem 5%;
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: 2px;
    display: flex;
    align-items: center;
    gap: 10px;
    text-shadow: 0 0 10px var(--neon-blue);
    color: #fff;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 40px;
}

nav ul li a {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 1rem;
    letter-spacing: 1px;
    transition: all 0.3s ease;
    position: relative;
}

nav ul li a::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: -5px;
    left: 0;
    background-color: var(--neon-blue);
    transition: width 0.3s ease;
    box-shadow: 0 0 8px var(--neon-blue);
}

nav ul li a:hover::after {
    width: 100%;
}

/* Neon Button */
.btn {
    background: transparent;
    color: var(--neon-blue);
    padding: 12px 30px;
    border: 2px solid var(--neon-blue);
    border-radius: 30px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.4s ease;
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.2) inset;
}

.btn:hover {
    background: var(--neon-blue);
    color: #000;
    box-shadow: 0 0 20px var(--neon-blue), 0 0 40px var(--neon-blue);
    transform: scale(1.05);
}

/* Hero Section - Floating 3D */
.hero {
    height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 0 20px;
    perspective: 1000px; /* Khung nhìn 3D */
}

.hero-content {
    animation: float 6s ease-in-out infinite;
    transform-style: preserve-3d;
}

@keyframes float {
    0% { transform: translateY(0px) rotateX(2deg); }
    50% { transform: translateY(-20px) rotateX(-2deg); }
    100% { transform: translateY(0px) rotateX(2deg); }
}

.hero h1 {
    font-size: 5rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(to right, #fff, var(--neon-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-transform: uppercase;
    letter-spacing: 3px;
}

.hero p {
    font-size: 1.4rem;
    max-width: 800px;
    margin: 0 auto 40px auto;
    color: #a5cdd8;
}

/* Containers & Grid with 3D Perspective */
.container {
    max-width: 1300px;
    margin: 80px auto;
    padding: 0 20px;
    perspective: 1200px; /* Bật 3D cho thẻ con */
}

.section-title {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 60px;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

/* 3D Glass Cards */
.card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 50px 30px;
    text-align: center;
    transition: transform 0.5s cubic-bezier(0.23, 1, 0.32, 1), box-shadow 0.5s ease;
    transform-style: preserve-3d;
}

.card:hover {
    transform: translateY(-15px) rotateX(10deg) rotateY(-5deg);
    box-shadow: -10px 20px 40px rgba(0, 0, 0, 0.6), 0 0 20px rgba(0, 240, 255, 0.2) inset;
    border: 1px solid rgba(0, 240, 255, 0.5);
}

.card i {
    font-size: 4rem;
    color: var(--neon-blue);
    margin-bottom: 25px;
    transform: translateZ(50px); /* Đẩy icon lồi lên 3D */
    display: inline-block;
    filter: drop-shadow(0 0 10px var(--neon-blue));
}

.card h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: #fff;
    transform: translateZ(30px); /* Đẩy chữ lồi lên 3D */
}

.card p {
    font-size: 1.1rem;
    color: #a5cdd8;
    transform: translateZ(20px);
}

/* Contact Form 3D */
.contact-wrapper {
    display: flex;
    gap: 50px;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.contact-info, .contact-form {
    flex: 1;
    min-width: 350px;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 50px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.contact-form {
    transform: rotateY(-5deg);
    transition: transform 0.5s;
}

.contact-form:hover {
    transform: rotateY(0deg) scale(1.02);
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    font-weight: 600;
    color: var(--neon-blue);
    letter-spacing: 1px;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 15px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    border-radius: 8px;
    color: #fff;
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-group input:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--neon-blue);
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
    background: rgba(0, 0, 0, 0.5);
}

/* Footer */
footer {
    background: rgba(0, 5, 15, 0.8);
    backdrop-filter: blur(10px);
    text-align: center;
    padding: 30px 20px;
    margin-top: auto;
    border-top: 1px solid var(--glass-border);
}

footer p {
    color: #6a8b99;
}

/* --- PREMIUM CSS LOGO ATLANTIC --- */
.logo {
    display: flex;
    align-items: center;
    gap: 15px;
    text-decoration: none;
}

/* Biểu tượng ATL với vòng Orbit 3D */
.atl-icon {
    position: relative;
    width: 50px;
    height: 50px;
    display: flex;
    justify-content: center;
    align-items: center;
    background: radial-gradient(circle, rgba(0, 31, 63, 0.8) 0%, rgba(0, 0, 0, 0) 70%);
}

.atl-icon .orbit {
    position: absolute;
    width: 100%;
    height: 40%;
    border: 2px solid var(--neon-blue);
    border-radius: 50%;
    transform: rotate(-20deg);
    box-shadow: 0 0 15px var(--neon-blue), inset 0 0 10px var(--neon-blue);
    animation: orbitSpin 6s linear infinite;
}

.atl-icon .text {
    color: #fff;
    font-weight: 900;
    font-size: 1.2rem;
    letter-spacing: 1px;
    text-shadow: 0 0 5px #fff, 0 0 10px var(--neon-blue);
    z-index: 2;
}

@keyframes orbitSpin {
    0% { transform: rotate(-20deg) scale(1); }
    50% { transform: rotate(-20deg) scale(1.1); }
    100% { transform: rotate(-20deg) scale(1); }
}

/* Chữ Atlantic & Slogan */
.atl-brand {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.atl-brand .company {
    color: #fff;
    font-size: 1.6rem;
    font-weight: 800;
    letter-spacing: 2px;
    line-height: 1;
    text-transform: uppercase;
    text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
}

.atl-brand .slogan {
    color: var(--neon-blue);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-top: 2px;
}