:root {
    --primary-color: #F7A600; /* Bybit Yellow */
    --dark-bg: #0D0D0D;
    --light-bg: #1A1A1A;
    --text-primary: #FFFFFF;
    --text-secondary: #AAAAAA;
    --card-bg: #1F1F1F;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    background-color: rgba(13, 13, 13, 0.8);
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    height: 35px;
}

.nav-btn {
    background-color: var(--primary-color);
    color: #000;
    padding: 0.6rem 1.2rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.3s ease;
}

.nav-btn:hover {
    background-color: #ffc107;
}

/* Main Content */
main {
    padding-top: 70px; /* Space for fixed header */
}

/* Hero Section */
.hero {
    background-image: linear-gradient(rgba(13, 13, 13, 0.8), rgba(13, 13, 13, 0.9)), url('hero-background.png');
    background-size: cover;
    background-position: center;
    padding: 120px 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero .subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2rem auto;
}

.cta-button {
    background-color: var(--primary-color);
    color: #000;
    padding: 1rem 2rem;
    border-radius: 5px;
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    display: inline-block;
    transition: transform 0.3s ease, background-color 0.3s ease;
    box-shadow: 0 4px 15px rgba(247, 166, 0, 0.2);
}

.cta-button:hover {
    background-color: #ffc107;
    transform: translateY(-3px);
}

/* Features Section */
.features {
    padding: 80px 0;
    background-color: var(--light-bg);
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 4rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    border: 1px solid #333;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.feature-icon {
    height: 60px;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--text-secondary);
}

/* CTA Section */
.cta-section {
    padding: 80px 0;
    text-align: center;
    background-color: var(--dark-bg);
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-section p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

/* Footer */
footer {
    background-color: var(--light-bg);
    padding: 30px 0;
    text-align: center;
    color: var(--text-secondary);
}

footer p {
    font-size: 0.9rem;
    max-width: 600px;
    margin: 5px auto;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }
    .features h2, .cta-section h2 {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }
    .hero .subtitle {
        font-size: 1rem;
    }
    .cta-button {
        padding: 0.8rem 1.5rem;
        font-size: 1rem;
    }
    header .container {
        flex-direction: column;
        gap: 10px;
    }
    main {
        padding-top: 110px;
    }
}