:root {
    /* 补充缺失的变量定义 */
    --card-shadow: var(--shadow);
    --text-primary: var(--text-color);
    --text-secondary: var(--secondary-color);
    --bg-color: var(--background-color);
    --border-color: #dee2e6;
    --input-bg: #fff;
    --primary-rgb: 0, 123, 255;
    --primary-hover: #0056b3;
}

.tool-container {
    margin: 20px auto;
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--card-shadow);
}

.ip-section {
    margin-bottom: 1.5rem;
}

.ip-section h2 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    border-left: 4px solid var(--primary-color);
    padding-left: 10px;
}

.loading-spinner {
    color: var(--text-secondary);
    font-style: italic;
    padding: 1rem;
    text-align: center;
}

.ip-card {
    background: var(--bg-color);
    border-radius: 8px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
}

.ip-display {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.ip-address {
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-color);
    font-family: monospace;
}

.copy-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 4px 8px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.2s;
}

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

.ip-details {
    display: grid;
    gap: 1rem;
}

.detail-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.full-details .detail-row {
    display: flex;
    justify-content: space-between;
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--border-color);
}

.full-details .detail-row:last-child {
    border-bottom: none;
}

.label {
    color: var(--text-secondary);
    font-weight: 500;
}

.value {
    color: var(--text-primary);
    font-weight: 600;
    text-align: right;
}

.divider {
    height: 1px;
    background: var(--border-color);
    margin: 2rem 0;
}

.input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 1rem;
}

.input-group input {
    flex: 1;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 1rem;
    background: var(--input-bg);
    color: var(--text-primary);
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(var(--primary-rgb), 0.1);
}

.primary-btn {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0 24px;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
}

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

.error-message {
    color: #dc3545;
    background: rgba(220, 53, 69, 0.1);
    padding: 10px;
    border-radius: 6px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.tool-info ul li {
    margin-top: 0.5rem;
    margin-left: 1.2rem;
}

@media (max-width: 600px) {
    .ip-address {
        font-size: 1.5rem;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .primary-btn {
        padding: 12px;
    }
}