/* Main Container Styles */
.itc-calculator-wrapper {
    max-width: 800px;
    margin: 2rem auto;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Card Styles */
.card {
    border: none;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    background-color: #fff;
}

.card-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid #e9ecef;
    padding: 1rem 1.5rem;
}

.card-title {
    margin: 0;
    font-size: 1.25rem;
    color: #2c3e50;
}

.card-body {
    padding: 1.5rem;
}

/* Form Styles */
.form-label {
    font-weight: 500;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.form-control, .form-select {
    border: 1px solid #ced4da;
    border-radius: 4px;
    padding: 0.5rem 0.75rem;
    font-size: 1rem;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus, .form-select:focus {
    border-color: #80bdff;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

/* Input Group Styles */
.input-group-text {
    background-color: #f8f9fa;
    border: 1px solid #ced4da;
    color: #495057;
}

/* Button Styles */
.btn-primary {
    background-color: #007bff;
    border-color: #007bff;
    padding: 0.75rem 1.5rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.2s ease-in-out;
}

.btn-primary:hover {
    background-color: #0069d9;
    border-color: #0062cc;
    transform: translateY(-1px);
}

.btn-outline-primary {
    border-color: #007bff;
    color: #007bff;
}

.btn-outline-primary:hover {
    background-color: #007bff;
    color: #fff;
}

/* Tax Regime Toggle Buttons */
.btn-group-toggle .btn {
    padding: 0.75rem 1.5rem;
}

.btn-group-toggle .btn.active {
    background-color: #007bff;
    color: #fff;
}

/* Results Table Styles */
.table {
    margin-bottom: 0;
}

.table th {
    background-color: #f8f9fa;
    font-weight: 500;
    width: 40%;
}

.table td {
    font-weight: 400;
}

.table-primary th,
.table-primary td {
    background-color: #cce5ff;
    color: #004085;
    font-weight: 600;
}

/* Loading Spinner */
.spinner-border {
    width: 3rem;
    height: 3rem;
}

/* Error Message Styles */
#itc-error {
    padding: 1rem;
    border-radius: 4px;
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
}

/* Tooltip Styles */
.fas.fa-info-circle {
    color: #6c757d;
    margin-left: 0.25rem;
    cursor: help;
}

/* Responsive Styles */
@media (max-width: 768px) {
    .itc-calculator-wrapper {
        margin: 1rem;
    }

    .card-body {
        padding: 1rem;
    }

    .btn-group-toggle .btn {
        padding: 0.5rem 1rem;
        font-size: 0.875rem;
    }

    .table th {
        width: 50%;
    }
}

/* Animation Styles */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#itc-results {
    animation: fadeIn 0.3s ease-out;
}

/* Validation Styles */
.was-validated .form-control:invalid,
.form-control.is-invalid {
    border-color: #dc3545;
    padding-right: calc(1.5em + 0.75rem);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12' width='12' height='12' fill='none' stroke='%23dc3545'%3e%3ccircle cx='6' cy='6' r='4.5'/%3e%3cpath stroke-linejoin='round' d='M5.8 3.6h.4L6 6.5z'/%3e%3ccircle cx='6' cy='8.2' r='.6' fill='%23dc3545' stroke='none'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}

.was-validated .form-control:valid,
.form-control.is-valid {
    border-color: #28a745;
    padding-right: calc(1.5em + 0.75rem);
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath fill='%2328a745' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right calc(0.375em + 0.1875rem) center;
    background-size: calc(0.75em + 0.375rem) calc(0.75em + 0.375rem);
}