body {
    margin: 0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    background-color: #f8f9fa;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    padding: 2rem 1rem;
    box-sizing: border-box;
}

.container {
    background: white;
    padding: 2.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1), 0 1px 3px rgba(0, 0, 0, 0.08);
    width: 100%;
    max-width: 1000px;
    box-sizing: border-box;
    margin-top: 2rem;
}

.form-group {
    margin-bottom: 2rem;
}

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

label {
    display: block;
    margin-bottom: 0.75rem;
    font-weight: 600;
    color: #2d3748;
    font-size: 1rem;
}

input, textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e2e8f0;
    border-radius: 6px;
    margin-bottom: 0.5rem;
    box-sizing: border-box;
    font-size: 0.95rem;
    transition: border-color 0.2s ease;
}

input:focus, textarea:focus {
    outline: none;
    border-color: #4299e1;
    box-shadow: 0 0 0 3px rgba(66, 153, 225, 0.1);
}

button[type="submit"] {
    background-color: #4299e1;
    color: white;
    padding: 1rem 2rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    width: 100%;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all 0.2s ease;
    margin-top: 1rem;
}

button[type="submit"]:hover {
    background-color: #3182ce;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(65, 153, 225, 0.3);
}

#nameForm, #transportForm {
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: translateY(-20px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

.radio-group {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.radio-label input[type="radio"] {
    width: auto;
    margin: 0;
} 

input[readonly] {
    background-color: #f7fafc;
    border: 2px solid #e2e8f0;
    cursor: not-allowed;
    color: #4a5568;
    user-select: none;
}

input[readonly]:focus {
    outline: none;
    box-shadow: none;
    border-color: #e2e8f0;
} 

.button-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.75rem;
    margin-bottom: 1rem;
}

/* Special layout for operator buttons (6 buttons) */
#operator-group {
    grid-template-columns: repeat(6, 1fr);
}

/* Special layout for delivery buttons (2 buttons) */
#delivery-group {
    grid-template-columns: repeat(2, 1fr);
}

/* Special layout for product buttons (6 buttons) */
#product-group {
    grid-template-columns: repeat(6, 1fr);
}

.choice-button {
    padding: 0.8rem 1rem;
    border: 2px solid #4299e1;
    background-color: white;
    color: #4299e1;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 600;
    font-size: 0.9rem;
    text-align: center;
    min-height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.choice-button:hover {
    background-color: #ebf8ff;
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(66, 153, 225, 0.2);
}

.choice-button.selected {
    background-color: #4299e1;
    color: white;
    box-shadow: 0 2px 4px rgba(66, 153, 225, 0.3);
} 

.hidden {
    display: none !important;
}

.weight-group {
    background-color: #f0fff4;
    padding: 1rem;
    border-radius: 8px;
    border-left: 4px solid #48bb78;
    margin-bottom: 1.5rem;
}

.weight-group label {
    color: #2d3748;
    margin-bottom: 0.5rem;
}

textarea {
    resize: vertical;
    min-height: 90px;
    font-family: inherit;
    line-height: 1.4;
}

/* Large screens - better horizontal layout */
@media (min-width: 1200px) {
    .container {
        padding: 3rem;
    }
    
    /* Create two-column layout for certain form groups */
    .form-row {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
        margin-bottom: 2rem;
    }
    
    .form-row .form-group {
        margin-bottom: 0;
    }
    
    .choice-button {
        padding: 1rem;
        font-size: 0.95rem;
        min-height: 52px;
    }
    
    /* Three-column layout for small inputs */
    .form-row-three {
        display: grid;
        grid-template-columns: 1fr 1fr 1fr;
        gap: 1.5rem;
        margin-bottom: 2rem;
    }
    
    .form-row-three .form-group {
        margin-bottom: 0;
    }
}

/* Medium to large screens */
@media (min-width: 900px) and (max-width: 1199px) {
    #operator-group {
        grid-template-columns: repeat(3, 1fr);
    }
    
    #product-group {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 1rem 0.5rem;
    }
    
    .container {
        padding: 1.5rem;
        margin-top: 1rem;
        max-width: 100%;
    }
    
    #operator-group,
    #product-group {
        grid-template-columns: repeat(2, 1fr);
    }
    
    #delivery-group {
        grid-template-columns: 1fr;
    }
    
    .choice-button {
        padding: 0.7rem 0.5rem;
        font-size: 0.85rem;
        min-height: 44px;
    }
    
    .form-group {
        margin-bottom: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 1rem;
    }
    
    #operator-group,
    #product-group,
    #delivery-group {
        grid-template-columns: 1fr;
    }
    
    .choice-button {
        padding: 0.75rem;
        min-height: 48px;
    }
}