/* --- Hero Section --- */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -2;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(18, 18, 18, 0.9) 0%, rgba(18, 18, 18, 0.4) 100%);
    z-index: -1;
}

.hero-content {
    max-width: 800px;
    padding-top: 80px;
}

.hero-content h1 {
    font-size: 4.5rem;
    line-height: 1.1;
    margin-bottom: 20px;
}

.hero-content .highlight {
    color: var(--accent-primary);
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: var(--text-muted);
}

.hero-btns {
    display: flex;
    gap: 15px;
}

@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 3rem;
    }

    .hero-btns {
        flex-direction: column;
    }
}

/* --- Features Section --- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.feature-card {
    background-color: var(--bg-light);
    padding: 40px 20px;
    border-radius: 8px;
    transition: var(--transition);
    border-bottom: 3px solid transparent;
}

.feature-card:hover {
    transform: translateY(-10px);
    border-bottom-color: var(--accent-primary);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.5);
}

.feature-icon {
    font-size: 3.5rem;
    color: var(--accent-primary);
    margin-bottom: 15px;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* --- Classes Snapshot --- */
.classes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

.class-card {
    position: relative;
    border-radius: 8px;
    overflow: hidden;
    height: 250px;
}

.class-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.class-card:hover img {
    transform: scale(1.1);
}

.class-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 20px;
    background: linear-gradient(to top, rgba(18, 18, 18, 1), transparent);
    text-align: left;
}

.class-overlay h3 {
    font-size: 1.5rem;
    margin-bottom: 5px;
}

.class-link {
    color: var(--accent-primary);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 5px;
}

.class-link:hover {
    color: var(--accent-secondary);
}

/* --- BMI Calculator --- */
.bmi-calc-box {
    background-color: var(--bg-light);
    padding: 50px;
    border-radius: 10px;
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    border: 1px solid #333;
}

.bmi-calc-box h2 span {
    color: var(--accent-primary);
}

.bmi-form {
    margin-top: 30px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.input-group {
    display: flex;
    gap: 15px;
}

.input-group input {
    flex: 1;
    padding: 15px;
    background-color: var(--bg-dark);
    border: 1px solid #444;
    color: var(--text-light);
    border-radius: 4px;
    font-size: 1rem;
}

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

.bmi-result {
    margin-top: 20px;
    font-size: 1.2rem;
    font-weight: 600;
}

.bmi-result span.bmi-value {
    color: var(--accent-primary);
    font-size: 1.8rem;
    display: block;
    margin-top: 10px;
}

@media (max-width: 600px) {
    .input-group {
        flex-direction: column;
    }
}

/* --- CTA Banner --- */
.cta-banner {
    background-color: var(--accent-primary);
    padding: 60px 0;
    text-align: center;
    color: #fff;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

.cta-content p {
    font-size: 1.2rem;
    margin-bottom: 25px;
}

.cta-form {
    display: flex;
    justify-content: center;
    gap: 10px;
    max-width: 500px;
    margin: 0 auto;
}

.cta-form input {
    flex: 1;
    padding: 12px 20px;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
}

.cta-form .btn-dark {
    background-color: var(--bg-dark);
    color: #fff;
    border: none;
}

.cta-form .btn-dark:hover {
    background-color: #333;
    color: var(--accent-primary);
}

@media (max-width: 600px) {
    .cta-form {
        flex-direction: column;
    }
}

/* --- Footer --- */
.footer {
    background-color: #000;
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.about-col p {
    color: var(--text-muted);
    margin: 15px 0;
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--bg-light);
    border-radius: 50%;
    font-size: 1.2rem;
}

.social-links a:hover {
    background-color: var(--accent-primary);
}

.footer-col h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 2px;
    background-color: var(--accent-primary);
}

.links-col ul li,
.contact-col ul li {
    margin-bottom: 15px;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 10px;
}

.links-col ul li a:hover {
    color: var(--accent-primary);
    padding-left: 5px;
}

.contact-col ul li i {
    color: var(--accent-primary);
    font-size: 1.2rem;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #222;
    color: var(--text-muted);
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}