.hero {
    min-height: 100vh; 
    background: linear-gradient(to bottom right, var(--color-primary), var(--color-secondary)); 
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: var(--color-light);
    padding: 0 1rem;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    letter-spacing: -1px;
}

.hero-title span {
    color: orange;
}

.hero-subtitle {
    font-size: 1.25rem; 
    font-weight: 400;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 3rem;
}

.cta-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    background-color: var(--color-light);
    color: var(--color-primary);
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.cta-button:hover {
    transform: scale(1.05);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.25); 
}

.cta-button:active {
    transform: scale(0.99);
}

@media (max-width: 767px) {
    .hero-title {
        font-size: 2.5rem; /* Chuẩn khít Specs Mobile: 2.5rem */
        margin-bottom: 1rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
        margin-bottom: 2.5rem;
    }

    .cta-button {
        padding: 0.75rem 2rem;
        font-size: 1rem;
    }
}