/**
 * Rounding Calculator Styles
 * Custom styling for the rounding calculator interface
 */

/* ===========================================
   Calculator Interface Specific Styles
   =========================================== */

.calculator-interface {
    max-width: 800px;
    margin: 0 auto;
}

.calculator-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.calculator-form fieldset {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin: 0;
    background: var(--card-background);
}

.calculator-form legend {
    font-weight: 600;
    color: var(--text-primary);
    padding: 0 0.5rem;
    font-size: 1.1rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group:last-child {
    margin-bottom: 0;
}

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

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    background: var(--input-background);
    color: var(--text-primary);
}

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

.form-help {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
    font-style: italic;
}

/* Radio Button Group Styles */
.radio-group {
    display: grid;
    gap: 0.75rem;
}

.radio-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    transition: all 0.3s ease;
    background: var(--input-background);
    font-weight: 500;
}

.radio-label:hover {
    background: var(--hover-background);
    border-color: var(--primary-color);
}

.radio-label input[type="radio"] {
    display: none;
}

.radio-custom {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    margin-right: 0.75rem;
    position: relative;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.radio-label:hover .radio-custom {
    border-color: var(--primary-color);
}

.radio-label input[type="radio"]:checked + .radio-custom {
    border-color: var(--primary-color);
    background: var(--primary-color);
}

.radio-label input[type="radio"]:checked + .radio-custom::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: white;
}

.radio-label input[type="radio"]:checked {
    color: var(--primary-color);
}

/* Form Actions */
.form-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 1.5rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    min-width: 120px;
    justify-content: center;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--primary-color-alpha);
}

.btn-secondary {
    background: var(--secondary-background);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--hover-background);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* Results Section */
.results-section {
    margin-top: 2rem;
    animation: slideIn 0.5s ease;
}

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

.results-title {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    text-align: center;
}

.results-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.result-item {
    padding: 1.5rem;
    background: var(--card-background);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--shadow-color);
}

.result-item h4 {
    font-size: 1.2rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.result-original,
.result-rounded {
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.result-original {
    color: var(--text-secondary);
}

.result-rounded {
    color: var(--text-primary);
}

.result-rounded .number.highlight {
    font-weight: 700;
    color: var(--primary-color);
    font-size: 1.2em;
    background: var(--primary-color-alpha);
    padding: 0.2em 0.4em;
    border-radius: 4px;
}

.result-explanation {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-style: italic;
    margin-top: 0.5rem;
    padding: 0.5rem;
    background: var(--secondary-background);
    border-radius: 4px;
    border-left: 3px solid var(--primary-color);
}

/* Error and Success Messages */
.error-messages {
    margin-bottom: 1rem;
}

.error-message {
    background: #fee;
    color: #c53030;
    padding: 1rem;
    border-radius: 6px;
    border: 1px solid #fed7d7;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.success-message {
    background: #f0fff4;
    color: #22543d;
    padding: 1rem;
    border-radius: 6px;
    border: 1px solid #9ae6b4;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Educational Content */
.rounding-methods {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    margin-top: 1.5rem;
}

.method-card {
    padding: 1.5rem;
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--shadow-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.method-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px var(--shadow-color);
}

.method-card h3 {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.method-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.method-example {
    background: var(--secondary-background);
    padding: 1rem;
    border-radius: 4px;
    border-left: 3px solid var(--primary-color);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    color: var(--text-primary);
}

/* Applications Grid */
.applications-grid {
    display: grid;
    gap: 1.5rem;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    margin-top: 1.5rem;
}

.application-card {
    padding: 1.5rem;
    background: var(--card-background);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 2px 8px var(--shadow-color);
    transition: transform 0.3s ease;
}

.application-card:hover {
    transform: translateY(-2px);
}

.application-card h3 {
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}

.application-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 0.95rem;
}

/* Dark Mode Support */
[data-theme="dark"] {
    --card-background: #2d3748;
    --input-background: #4a5568;
    --secondary-background: #374151;
    --hover-background: #4a5568;
    --border-color: #4a5568;
    --shadow-color: rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .radio-label {
    background: var(--input-background);
}

[data-theme="dark"] .radio-label:hover {
    background: var(--hover-background);
}

[data-theme="dark"] .result-item {
    background: var(--card-background);
    border-color: var(--border-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .calculator-form fieldset {
        padding: 1rem;
    }
    
    .form-actions {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn {
        width: 100%;
    }
    
    .results-grid {
        grid-template-columns: 1fr;
    }
    
    .rounding-methods {
        grid-template-columns: 1fr;
    }
    
    .applications-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .calculator-interface {
        padding: 0 0.5rem;
    }
    
    .calculator-form fieldset {
        padding: 0.75rem;
    }
    
    .radio-label {
        padding: 0.5rem;
        font-size: 0.9rem;
    }
    
    .method-card,
    .application-card {
        padding: 1rem;
    }
    
    .result-item {
        padding: 1rem;
    }
}

/* Accessibility Enhancements */
@media (prefers-reduced-motion: reduce) {
    .results-section {
        animation: none;
    }
    
    .method-card:hover,
    .application-card:hover {
        transform: none;
    }
    
    .btn:hover {
        transform: none;
    }
}

/* Print Styles */
@media print {
    .form-actions,
    .calculator-form {
        display: none;
    }
    
    .results-section {
        display: block !important;
    }
    
    .result-item {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #000;
    }
}