:root {
    --primary-color: #00ff9d;
    --secondary-color: #000000;
    --text-color: #ffffff;
    --light-bg: #f5f5f5;
    --card-bg: rgba(0, 0, 0, 0.8);
}

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

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: url('./img/aeca002.jpg') no-repeat center center fixed;
    background-size: cover;
    min-height: 100vh;
}

header {
    background-color: transparent;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1000px;
    margin: 0 auto;
    background-color: rgba(0, 0, 0, 0.9);
    border-radius: 0 0 15px 15px;
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    animation: glow 2s infinite;
}

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

nav ul li a {
    text-decoration: none;
    color: var(--text-color);
    padding: 0.5rem 1rem;
    margin: 0 0.5rem;
    transition: color 0.3s;
    position: relative;
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: all 0.3s ease;
}

nav ul li a:hover::after {
    width: 100%;
    left: 0;
}
.download-link {
    color: #FFA500; /* Màu cam dễ nhìn */
    font-weight: bold;
    text-decoration: none;
}

.download-link:hover {
    color: #FF6347; /* Đổi sang đỏ cam khi rê chuột */
    text-decoration: underline;
}

.buy-link {
    color: #90EE90; /* Xanh lá nhạt */
    font-weight: bold;
    text-decoration: none;
}

.buy-link:hover {
    color: #32CD32; /* Xanh lá sáng hơn khi rê chuột */
    text-decoration: underline;
}
.hero {
    padding: 0 5%;
    text-align: center;
    background: rgba(0, 0, 0, 0.6);
    position: relative;
    animation: fadeIn 1s ease-out;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: fadeIn 1.2s ease-out;
}

.hero-subtitle {
	font-size: 2rem;
    animation: fadeIn 1.4s ease-out;
	color: lightblue;
    margin-bottom: 1rem;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: transparent;
    border: 2px solid var(--primary-color);
    color: var(--text-color);
    text-decoration: none;
    border-radius: 5px;
    margin-top: 2rem;
    transition: all 0.3s;
    font-weight: bold;
    animation: pulse 2s infinite;
}

.cta-button:hover {
    background-color: rgba(0, 255, 157, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 255, 157, 0.2);
    color: var(--primary-color);
    animation: none;
}

.features-grid, .reviews-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    padding: 4rem 5%;
    max-width: 1200px;
    margin: 0 auto;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.features-grid.visible {
    opacity: 1;
    transform: translateY(0);
}

.feature-card, .review-card {
    padding: 2rem;
    background: var(--card-bg);
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 4px 20px rgba(0, 255, 157, 0.2);
}

h2 {
    text-align: center;
    margin-bottom: 2rem;
    padding-top: 2rem;
}

footer {
    text-align: center;
    padding: 2rem;
    background-color: rgba(0, 0, 0, 0.9);
    color: var(--text-color);
    position: relative;
}

#features {
    padding-top: 5rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

#reviews {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 2rem 0;
}

@media (max-width: 768px) {
    nav {
        width: 90%;
        margin: 0 auto;
        padding: 1rem;
        border-radius: 15px;
        margin-top: 1rem;
    }
    
    nav ul {
        margin-top: 1rem;
    }
    
    .hero {
        padding: 0 5%;
    }

    #features, #reviews {
        padding-top: 3rem;
    }
}

/* 添加一些基础动画关键帧 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

@keyframes glow {
    0% { text-shadow: 0 0 5px rgba(0, 255, 157, 0.5); }
    50% { text-shadow: 0 0 20px rgba(0, 255, 157, 0.8); }
    100% { text-shadow: 0 0 5px rgba(0, 255, 157, 0.5); }
}