:root {
    --nav-color: #212529;
    --nav-hover-color: #e03a3c;
    --nav-mobile-background-color: #ffffff;
    --nav-dropdown-background-color: #ffffff;
    --nav-dropdown-color: #212529;
    --nav-dropdown-hover-color: #e03a3c;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--nav-color) 0%, #e03a3c 5%, #15181a 60%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    text-align: center;
    width: 100%;
    max-width: 1200px;
    padding: 40px;
}

.greeting-text {
    font-size: 3.5rem;
    font-weight: 600;
    color: #ffffff;
    margin-bottom: 20px;
    letter-spacing: -0.01em;
    line-height: 1.1;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    opacity: 0.9;
}

.header-text {
    font-size: 54px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 60px;
    letter-spacing: -0.02em;
    line-height: 1.1;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
}

.button-group {
    display: flex;
    gap: 30px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    font-size: 1.8rem;
    font-weight: 600;
    padding: 28px 60px;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), 
                box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: -0.01em;
    min-width: 220px;
    position: relative;
    overflow: hidden;
    display: inline-block;
    text-decoration: none;
    text-align: center;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary {
    background: var(--nav-hover-color);
    color: #ffffff;
    box-shadow: 0 8px 24px rgba(224, 58, 60, 0.4);
}

.btn-primary:hover {
    transform: scale(1.08);
    box-shadow: 0 12px 32px rgba(224, 58, 60, 0.5);
    background: var(--nav-hover-color);
}

.btn-primary:active {
    transform: scale(1.05);
}

.btn-secondary {
    background: var(--nav-mobile-background-color);
    color: var(--nav-color);
    box-shadow: 0 8px 24px rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    transform: scale(1.08);
    box-shadow: 0 12px 32px rgba(255, 255, 255, 0.3);
    color: var(--nav-hover-color);
}

.btn-secondary:active {
    transform: scale(1.05);
}

/* Responsive Design */
@media (max-width: 768px) {
    .greeting-text {
        font-size: 2.4rem;
        margin-bottom: 15px;
    }
    
    .header-text {
        font-size: 3rem;
        margin-bottom: 50px;
    }
    
    .btn {
        font-size: 1.5rem;
        padding: 24px 50px;
        min-width: 200px;
    }
    
    .button-group {
        gap: 20px;
    }
}

@media (max-width: 480px) {
    .greeting-text {
        font-size: 1.8rem;
        margin-bottom: 10px;
    }
    
    .header-text {
        font-size: 2.2rem;
        margin-bottom: 40px;
    }
    
    .btn {
        font-size: 1.3rem;
        padding: 20px 40px;
        min-width: 180px;
    }
    
    .button-group {
        flex-direction: column;
        align-items: center;
    }
    
    .container {
        padding: 20px;
    }
}

@media (min-width: 1400px) {
    .greeting-text {
        font-size: 4.5rem;
    }
    
    .header-text {
        font-size: 4rem;
    }
    
    .btn {
        font-size: 2rem;
        padding: 32px 70px;
    }
}