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

body {
    font-family: Arial, sans-serif;
    background: url('images/pool_background.jpg') no-repeat center center/cover;
    color: white;
    line-height: 1.6;
}

/* Hero Section */
header {
    text-align: center;
    padding: 40px 20px;
    background: rgba(0, 0, 0, 0.45);
}

.logo {
    max-width: 300px;
    margin-bottom: 15px;
    border-radius: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
    /* mix-blend-mode: multiply; /* or screen / darken depending on background */
    background: transparent;
}

header h1 {
    font-size: 3rem;
    font-weight: bold;
    color: white;
    letter-spacing: 2px;
}

header h2 {
    font-size: 1.5rem;
    color: white;
    margin-top: 5px;
}

/* Classes Section */
section {
    background: rgba(0, 0, 0, 0.6);
    padding: 40px 20px;
    text-align: center;
}

section h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: white;
}

.class-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.class-card {
    background: rgba(255, 255, 255, 0.08);
    padding: 20px;
    border-radius: 10px;
    transition: 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.class-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
}

.class-card h3 {
    font-size: 1.3rem;
    color: #00baff;
    margin-bottom: 10px;
}

.class-card p {
    font-size: 0.95rem;
}

/* WhatsApp Button */
.whatsapp-btn {
    display: inline-block;
    margin-top: 30px;
    padding: 15px 25px;
    background: #25D366;
    color: white;
    font-size: 1.2rem;
    border-radius: 50px;
    text-decoration: none;
    transition: 0.3s;
    font-weight: bold;
}

.whatsapp-btn:hover {
    background: #1ebe5d;
}

/* Footer */
footer {
    background: rgba(0, 0, 0, 0.8);
    padding: 20px;
    text-align: center;
    font-size: 0.9rem;
    color: #ddd;
}

footer .dev-name {
    font-weight: bold;
    color: #00baff;
}

footer p {
    margin: 5px 0;
}

/* Mobile adjustments */
@media (max-width: 600px) {
    header h1 {
        font-size: 2rem;
    }
    header h2 {
        font-size: 1.2rem;
    }
    .logo {
        max-width: 120px;
    }
}