:root {
    --primary-color: #4a90e2;
    --secondary-color: #2c3e50;
    --accent-color: #e74c3c;
    --text-color: #333;
    --light-gray: #f5f6fa;
    --white: #ffffff;
}

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

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: linear-gradient(135deg, var(--light-gray) 0%, var(--white) 100%);
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    text-align: center;
    margin-bottom: 4rem;
}

h1 {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.tagline {
    font-size: 1.2rem;
    color: var(--secondary-color);
}

.coming-soon {
    text-align: center;
    margin-bottom: 4rem;
}

.coming-soon h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--secondary-color);
}

.description {
    max-width: 800px;
    margin: 0 auto 3rem;
    font-size: 1.1rem;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.feature {
    padding: 2rem;
    background: var(--white);
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.feature:hover {
    transform: translateY(-5px);
}

.feature i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.feature h3 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.waitlist {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
    padding: 2rem;
    background: var(--white);
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.waitlist h2 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.signup-form {
    margin-top: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

input {
    width: 100%;
    padding: 1rem;
    border: 2px solid #eee;
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

input:focus {
    border-color: var(--primary-color);
    outline: none;
}

.submit-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 5px;
    font-size: 1.1rem;
    cursor: pointer;
    transition: background 0.3s ease;
}

.submit-btn:hover {
    background: #357abd;
}

.btn-icon {
    margin-left: 0.5rem;
}

footer {
    text-align: center;
    margin-top: 4rem;
    color: var(--secondary-color);
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    position: relative;
    max-width: 400px;
    width: 90%;
}

.success-icon {
    font-size: 3rem;
    color: #2ecc71;
    margin-bottom: 1rem;
}

.close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 1.5rem;
    cursor: pointer;
    color: #666;
}

.courses {
    text-align: center;
    margin-bottom: 4rem;
    padding: 2rem 0;
}

.courses h2 {
    font-size: 2.2rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.courses-intro {
    max-width: 800px;
    margin: 0 auto 3rem;
    font-size: 1.1rem;
    color: var(--secondary-color);
}

.course-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 0 auto;
    max-width: 1200px;
}

.course-category {
    background: var(--white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.course-category:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.course-category i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    background: var(--light-gray);
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.course-category:hover i {
    background: var(--primary-color);
    color: var(--white);
}

.course-category h3 {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.course-category p {
    color: #666;
    line-height: 1.5;
    margin: 0;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }
    
    .coming-soon h2 {
        font-size: 2rem;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 1rem;
    }
    
    .course-categories {
        grid-template-columns: 1fr;
        padding: 0 1rem;
    }
    
    .courses h2 {
        font-size: 1.8rem;
        padding: 0 1rem;
    }
    
    .courses-intro {
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }
    
    .coming-soon h2 {
        font-size: 1.75rem;
    }
    
    .description {
        font-size: 1rem;
    }
}