/* ============================================
   CALCULATOR SPECIFIC STYLES
   ============================================ */

/* Calculator Container */
.calculator-container {
    background: var(--bg-white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
    margin: 2rem 0;
}

.calculator-header {
    margin-bottom: 2rem;
}

.calculator-header h1 {
    color: var(--text-dark);
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.calculator-header p {
    color: var(--text-light);
    font-size: 1rem;
}

/* Calculator Form */
.calculator-form {
    display: grid;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.9375rem;
}

.form-group input,
.form-group select {
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group input:invalid {
    border-color: #ef4444;
}

.form-group .input-hint {
    font-size: 0.875rem;
    color: var(--text-light);
}

/* Button Styles */
.btn-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-top: 0.5rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background-color: #6b7280;
    color: white;
}

.btn-secondary:hover {
    background-color: #4b5563;
}

/* Results Section */
.results-section {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: var(--bg-light);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
    display: none;
}

.results-section.show {
    display: block;
    animation: fadeIn 0.3s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.results-section h3 {
    color: var(--text-dark);
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.result-item {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.result-item:last-child {
    border-bottom: none;
}

.result-item .label {
    color: var(--text-light);
    font-weight: 500;
}

.result-item .value {
    color: var(--text-dark);
    font-weight: 700;
    font-size: 1.125rem;
}

.result-item .value.highlight {
    color: var(--primary-color);
    font-size: 1.25rem;
}

/* Content Sections */
.content-section {
    margin: 3rem 0;
}

.content-section h2 {
    color: var(--text-dark);
    font-size: 1.75rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.content-section h3 {
    color: var(--text-dark);
    font-size: 1.5rem;
    margin: 1.5rem 0 1rem 0;
}

.content-section p {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.8;
}

.content-section ul,
.content-section ol {
    margin: 1rem 0;
    padding-left: 2rem;
    color: var(--text-light);
}

.content-section li {
    margin-bottom: 0.5rem;
    line-height: 1.8;
}

/* FAQ Section */
.faq-section {
    margin: 3rem 0;
}

.faq-item {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 1rem;
    overflow: hidden;
}

.faq-question {
    padding: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background-color 0.2s;
}

.faq-question:hover {
    background-color: var(--bg-light);
}

.faq-question::after {
    content: '+';
    font-size: 1.5rem;
    color: var(--primary-color);
    transition: transform 0.3s;
}

.faq-item.active .faq-question::after {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 1.25rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    color: var(--text-light);
}

.faq-item.active .faq-answer {
    max-height: 500px;
    padding: 0 1.25rem 1.25rem 1.25rem;
}

/* Related Tools */
.related-tools {
    margin: 3rem 0;
    padding: 1.5rem;
    background: var(--bg-white);
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.related-tools h2 {
    color: var(--text-dark);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.related-tools ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.75rem;
}

.related-tools a {
    color: var(--primary-color);
    text-decoration: none;
    padding: 0.5rem;
    display: block;
    border-radius: 4px;
    transition: background-color 0.2s;
}

.related-tools a:hover {
    background-color: var(--bg-light);
    text-decoration: underline;
}

/* Error Messages */
.error-message {
    color: #ef4444;
    font-size: 0.875rem;
    margin-top: 0.25rem;
    display: none;
}

.error-message.show {
    display: block;
}

/* Responsive Calculator */
@media (max-width: 768px) {
    .calculator-container {
        padding: 1.5rem;
    }

    .calculator-header h1 {
        font-size: 1.75rem;
    }

    .btn-group {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .result-item {
        flex-direction: column;
        gap: 0.25rem;
    }

    .related-tools ul {
        grid-template-columns: 1fr;
    }
}