:root {
    --primary: #6c5ce7;
    --primary-hover: #5b4dd1;
    --bg-light: #f5f6fa;
    --border-color: #e4e6ef;
    --text-primary: #2d3436;
    --text-secondary: #636e72;
    --success: #00b894;
    --warning: #fdcb6e;
    --danger: #d63031;
}



.display-5 {
    font-size: 1.75rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    color: var(--primary);
}

.card, .info-card {
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    background: #ffffff;
}

.card-body, .info-card {
    padding: 1.5rem;
}

h6 {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 600;
    display: flex;
    align-items: center;
}

.input-group {
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    overflow: hidden;
}

.input-group-text {
    background: var(--bg-light);
    border: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
    min-width: 100px;
    justify-content: center;
}

.form-control, .form-select {
    border: none;
    border-left: 1px solid var(--border-color);
    font-size: 0.95rem;
    padding: 0.625rem 0.75rem;
    color: var(--text-primary);
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

.form-text {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.375rem;
    margin-left: 0.25rem;
}

/* 禁用所有元素的focus状态 */
*:focus {
    outline: none !important;
    box-shadow: none !important;
    border-color: var(--border-color) !important;
}

.btn {
    padding: 0.75rem 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 0.5rem;
}

.btn-primary {
    background-color: var(--primary);
    border: none;
}

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

.btn-light {
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.btn-light:hover {
    background-color: #f1f5f9;
}

.results-container {
    min-height: 50px;
}

.result-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.result-text {
    background: var(--bg-light);
    padding: 1rem;
    border-radius: 0.5rem;
    font-family: 'SF Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    font-size: 0.875rem;
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-all;
}

.result-text.input {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

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

.info-content {
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.info-content p {
    margin-bottom: 0.75rem;
}

.info-content ul {
    padding-left: 1.25rem;
}

.info-content li {
    margin-bottom: 0.25rem;
}

.empty-result {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-secondary);
    background: #ffffff;
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
}

.empty-result i {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--primary);
    display: block;
}

.empty-result div {
    font-size: 0.875rem;
}

footer {
    margin-top: 1.5rem;
}

footer small {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: inline-flex;
    align-items: center;
    background: #ffffff;
    padding: 0.5rem 1rem;
    border-radius: 1rem;
    border: 1px solid var(--border-color);
}

@media (max-width: 576px) {
 
    .card-body, .info-card {
        padding: 1rem;
    }
    
    .result-text {
        padding: 0.75rem;
        font-size: 0.8125rem;
    }
}

.operation-type-group {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.25rem;
}

.operation-btn {
    flex: 1;
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
}

.operation-btn:hover {
    background: #f1f5f9;
}

.operation-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
}

.operation-btn.active:hover {
    background: var(--primary-hover);
}