:root {
    --primary-color: #25D366;
    --secondary-color: #128C7E;
    --accent-color: #34B7F1;
    --text-color: #333;
    --bg-color: #f5f5f5;
    --white: #ffffff;
    --gray-light: #f8f9fa;
    --gray: #6c757d;
    --shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    --radius: 12px;
    --transition: all 0.3s ease;
}


.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* Math Solver Specific Styles */
.math-container {
    max-width: 1000px;
    margin: 2rem auto;
    padding: 2rem;
    background-color: var(--white);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.math-header {
    text-align: center;
    margin-bottom: 2rem;
}

.math-header h1 {
    color: var(--secondary-color);
    margin-bottom: 0.5rem;
}

.math-header p {
    color: var(--gray);
}

.input-container {
    margin-bottom: 2rem;
}

.input-tabs {
    display: flex;
    border-bottom: 1px solid #ddd;
    margin-bottom: 1rem;
}

.input-tab {
    padding: 0.8rem 1.5rem;
    cursor: pointer;
    border: none;
    background: none;
    font-weight: 500;
    color: var(--gray);
    transition: var(--transition);
    border-bottom: 2px solid transparent;
}

.input-tab.active {
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
}

.input-tab:hover {
    color: var(--secondary-color);
}

.input-content {
    display: none;
}

.input-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-color);
}

.form-control {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: var(--radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 211, 102, 0.2);
}

textarea.form-control {
    height: 120px;
    resize: vertical;
    font-family: monospace;
}

.file-input-container {
    position: relative;
    margin-bottom: 1rem;
}

.file-input {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: var(--radius);
    background-color: var(--gray-light);
    cursor: pointer;
}

.file-preview {
    margin-top: 1rem;
    max-width: 100%;
    max-height: 200px;
    display: none;
}

.file-preview.show {
    display: block;
}

.pdf-preview-container {
    margin-top: 1rem;
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid #ddd;
    border-radius: var(--radius);
    padding: 1rem;
    background-color: var(--gray-light);
    display: none;
}

.pdf-preview-container.show {
    display: block;
}

.pdf-page {
    margin-bottom: 1rem;
    border: 1px solid #ddd;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

.btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn:hover {
    background-color: var(--secondary-color);
}

.btn:disabled {
    background-color: var(--gray);
    cursor: not-allowed;
}

.btn i {
    margin-right: 0.5rem;
}

.output-container {
    background-color: var(--gray-light);
    border-radius: var(--radius);
    padding: 1.5rem;
    min-height: 300px;
}

.output-container.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 4px solid rgba(37, 211, 102, 0.2);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

.solution-title {
    font-weight: 500;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.solution-steps {
    margin-top: 1rem;
}

.step {
    background-color: var(--white);
    padding: 1rem;
    border-radius: var(--radius);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 1rem;
    transition: var(--transition);
    border-left: 3px solid var(--primary-color);
}

.step:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.api-key-section {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: #fff3cd;
    border-radius: var(--radius);
    border-left: 3px solid #ffc107;
    display: none;
}

.api-key-section h3 {
    color: #856404;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
}

.api-key-section h3 i {
    margin-right: 0.5rem;
}

.api-key-section p {
    margin-bottom: 1rem;
    color: #856404;
}

.api-key-toggle {
    background: none;
    border: none;
    color: var(--accent-color);
    cursor: pointer;
    font-weight: 500;
    padding: 0;
    margin-bottom: 1rem;
    display: inline-block;
}

.api-key-form {
    display: none;
    padding: 1rem;
    background-color: rgba(255, 255, 255, 0.5);
    border-radius: var(--radius);
    margin-top: 1rem;
}

.api-key-form.show {
    display: block;
    animation: fadeIn 0.3s ease;
}

#api-key-status {
    margin-top: 0.5rem;
    font-weight: 500;
}

.api-key-status-success {
    color: var(--secondary-color);
}

.api-key-status-error {
    color: #dc3545;
}

.explanation {
    background-color: #f8f9fa;
    padding: 1.5rem;
    border-radius: var(--radius);
    margin-top: 2rem;
    border-left: 3px solid var(--accent-color);
}

.explanation h3 {
    margin-bottom: 1rem;
    color: var(--secondary-color);
}

.explanation p {
    margin-bottom: 0.8rem;
}

.example-problems {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.example-problem {
    background-color: var(--white);
    border: 1px solid #ddd;
    border-radius: var(--radius);
    padding: 0.5rem 1rem;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
}

.example-problem:hover {
    background-color: var(--gray-light);
    border-color: var(--primary-color);
}

.error-message {
    color: #dc3545;
    background-color: #f8d7da;
    border-radius: var(--radius);
    padding: 0.8rem;
    margin-bottom: 1rem;
    display: none;
}

.error-message.show {
    display: block;
    animation: fadeIn 0.3s ease;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Responsive styles */
@media (max-width: 768px) {
    .math-container {
        padding: 1.5rem;
    }
    
    .input-tab {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
    
    .example-problems {
        flex-direction: column;
    }
}

/* Accessibility focus styles */
button:focus, 
input:focus, 
textarea:focus, 
select:focus {
    outline: 3px solid rgba(37, 211, 102, 0.5);
    outline-offset: 2px;
}