.calc-container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 20px;
}

.calc-header {
    text-align: center;
    margin-bottom: 40px;
}

.calc-header h1 {
    font-size: 2.8rem;
    margin-bottom: 10px;
    color: #f0f0f0;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

.calc-header p {
    font-size: 1.2rem;
    color: #a0a0a0;
    max-width: 600px;
    margin: 0 auto;
}

.divider {
    border: none;
    height: 3px;
    background: #1565c0;
    width: 300px;
    margin: 0 auto;
    margin-bottom: 5px;    
}

.calc-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.calc-card {
    background: linear-gradient(145deg, #2b2b2b, #232323);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 4px 4px 12px 5px rgb(143.44, 204.1, 239.06, 0.21);
    transition: all 0.4s ease;
    border: 2px solid #0c37b3;
    display: flex;
    flex-direction: column;
    max-height: 125px;
}

.calc-card.active {
    max-height: 600px;
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.4);
    border-color: #0dcaf0;

}

.calc-card-header {
    padding-left: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    min-height: 126px;
    max-height: 126px;
    border-bottom: 1px solid #2b2b2b;
    transition: background-color 0.3s, box-shadow 0.3s;
}

.calc-card-header:hover {
    background-color: rgba(13, 202, 240, 0.1);
    border-bottom: 1px solid #606060;
    box-shadow: 1px 1px 12px 4px rgb(105.59, 245.04, 243.88, 0.35);;
    border-radius: 8px;

}

.calc-card:hover{
    box-shadow: 1px 1px 16px 8px rgb(11.953, 179.3, 177.9, 0.65);
    border: 2px solid #f9ede5;
}

.calc-card-icon {
    font-size: 2rem;
    margin-right: 15px;
    width: 50px;
    text-align: center;
    color: #0dcaf0;
}

.calc-card-content {
    flex: 1;
}

.calc-card-content h2 {
    font-size: 1.4rem;
    margin-bottom: 8px;
    color: #f0f0f0;
}

.calc-card-content p {
    color: #a0a0a0;
    font-size: 0.95rem;
    line-height: 1.5;
}

.calc-submenu {
    padding: 10px 20px 0px 20px;
    margin-bottom: 15px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.5s ease, opacity 0.4s ease;
    opacity: 0;
}

.calc-card.active .calc-submenu {
    max-height: 300px;
    opacity: 1;
}

.calc-submenu div a {
    display: block;
    padding: 12px 15px;
    width: 90%;
    height: 25px;
    line-height: 25px;
    margin-bottom: 10px;
    background-color: #1e1e1e;
    border: 1px solid #444;
    border-radius: 8px;
    color: #0dcaf0;
    text-decoration: none;
    font-size: 1.2rem;
    transition: all 0.2s;
}

.calc-submenu div a:hover {
    background-color: #86e5f8;
    border: 1px double white ;
    color: #0d1b2a;
    color: #0c4e74;
    font-size: 1.4rem;
    letter-spacing: 0.06rem;
    text-shadow: 1px 1px 1px blue;
    transform: translateX(5px);
    box-shadow: 0 5px 15px 4px rgb(134.05, 229.3, 248.45, 0.6);
    
}


@media (max-width: 900px) {
    .calc-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 500px) {
    .header h1 {
        font-size: 2.2rem;
    }
    
    .calc-card-header {
        padding: 15px;
    }
    
    .calc-card-icon {
        font-size: 1.8rem;
        margin-right: 12px;
    }
    
    .calc-card-content h2 {
        font-size: 1.2rem;
    }
}